Last Updated on 15 September, 2026 by Elby | The Tasteful Pantry
This leftover lamb pie takes everything good about a roast dinner – tender lamb, cooked vegetables and plenty of savoury flavour – and wraps it in pastry. The lamb and vegetables simmer briefly in a rich rosemary gravy before being spooned into a shortcrust base and covered with golden puff pastry. It’s comforting, flexible and exactly what I want when the fridge contains several containers of roast dinner odds and ends, none of which quite constitutes a meal on its own.
I’ve cooked enough family roasts to know that judging quantities is apparently not a skill I’m interested in developing. Sometimes I deliberately cook extra lamb and vegetables; other times I simply stand back after dinner and wonder who I thought was coming. Either way, this pie turns those extras into an entirely new family meal while helping reduce food waste.
If you regularly find yourself trying to make dinner from a collection of useful-but-unmatched leftovers, my guide to using leftovers has plenty of other ideas. You might also like my leftover beef brisket pie when beef rather than lamb is occupying the fridge.
What Can I Make With Leftover Roast Lamb?
Leftover roast lamb can be added to curries, pasta sauces, wraps, fried rice and salads, but pie is hard to beat when you also have leftover roast vegetables to use. Everything can go into the same filling, surrounded by enough gravy to bring it together and covered with crisp pastry.
Because the lamb is already cooked, it doesn’t need a long cooking time. You’re simply warming it gently and giving it a new sauce. This makes leftover lamb pie far quicker than a traditional meat pie that starts with raw meat and needs several hours to become tender.
It’s also very adaptable. Three cups of lamb is ideal for a generously filled pie, but the quantities don’t need to be exact. If you’re slightly short of meat, add more vegetables. If you have plenty of lamb but few vegetables, frozen peas, diced carrots or green beans can make up the difference.
The filling is deliberately simple so it works with lamb cooked in different ways. Rosemary and smoked paprika add warmth without taking over, while tomato paste and stock create the base of the gravy. The final seasoning can then be adjusted to suit the flavours already on your roast.
Choosing The Ingredients For Your Leftover Lamb Pie Recipe?
Leftover roast lamb: Both roast leg and shoulder work well. Remove any bones and very large pieces of fat, then dice or shred the meat. Keep the pieces fairly substantial so they remain tender and don’t disappear into the sauce.
Lamb that has been cooked with garlic and rosemary will slip straight into this filling. Strongly spiced lamb can still work, but you may want to change the herbs so the flavours make sense together. More on that below.
Cooked vegetables: Leftover carrots, peas, beans, parsnips, pumpkin and potatoes are all excellent. Cut larger vegetables into bite-sized pieces so the filling is easy to serve and eat.
You can combine several small amounts rather than committing to a single vegetable. That half a carrot, lonely scoop of peas and three pieces of roast pumpkin suddenly have a plan.
Avoid adding too many very soft or watery vegetables. Zucchini, for example, can loosen the gravy, while soft roast pumpkin may break down and thicken it. Neither is a disaster, but you may need to adjust the liquid or thickener accordingly.
Onion and garlic: These give the gravy a freshly cooked foundation rather than making the pie taste as though the entire roast dinner was simply tipped into pastry. Cook the onion until properly softened before adding the garlic.
Tomato paste: Tomato paste adds savoury depth, colour and a mild sweetness. Cooking it briefly in the pan removes its raw, sharp flavour.
Vegetable stock: Vegetable stock keeps the filling flexible and works with almost any combination of lamb and vegetables. Beef stock can also be used for a darker, more intensely savoury gravy.
Choose salt-reduced stock if your lamb, vegetables or gravy were already well seasoned. You can always add salt later. Removing it is a little harder.
Rosemary: Rosemary is a natural partner for roast lamb, but it’s quite assertive. Add the whole sprigs while the filling simmers, then remove the woody stems before assembling the pie.
Smoked paprika: A small amount adds warmth and depth rather than making the filling noticeably smoky. Sweet paprika can be substituted if that’s what you have.
Gravy powder or flour: Either can thicken the filling. Gravy powder adds extra seasoning and colour, while plain flour gives you greater control over the final flavour. Always mix it with cold water before adding it so it doesn’t form lumps.
Shortcrust pastry: Shortcrust creates a firm base that can support the filling. Homemade pastry gives the pie a lovely buttery flavour, but frozen shortcrust is a perfectly sensible shortcut.
My foolproof shortcrust pastry guide explains rolling, lining and blind baking in more detail.
Puff pastry: Puff pastry is used for the lid because it rises into crisp, flaky layers. Let a frozen sheet thaw until flexible but still cool. Pastry that becomes warm and floppy is more difficult to handle and won’t puff as effectively.
Egg: Beaten egg helps seal the lid to the base and gives the baked pastry an even golden finish.
How To Make Leftover Roast Lamb Pie
The pie has three main parts: prepare the base, cook and cool the filling, then assemble and bake. None is difficult, but allowing enough time for the pastry and filling to cool will make the assembly considerably easier.
Step one: Make the shortcrust pastry.
Place the flour, salt, cold butter and egg yolk in a food processor. Process while gradually adding cold water, stopping as soon as the mixture comes together into a dough.
The exact amount of water can vary with the flour and even the weather, so add it slowly. The dough should hold together without feeling wet or sticky. Overmixing develops the gluten and can make pastry tough, so once it forms a ball, its time in the food processor is over.
Wrap the pastry and refrigerate it while you prepare the filling. Chilling firms the butter and relaxes the dough, making it easier to roll without shrinking as dramatically in the oven.
Using frozen shortcrust? Let it thaw just enough to bend without cracking, then move ahead to lining the pie dish.
Step two: Build the gravy.
Heat the oil in a large saucepan over medium-high heat. Add the diced onion and cook until softened, stirring occasionally so the edges don’t catch.
Add the garlic and cook briefly, just until fragrant. Stir in the tomato paste and let it cook for another half-minute. This small step rounds out its flavour and gives the gravy a richer base.
Step three: Add the lamb and vegetables.
Pour in the stock, then add the diced or shredded lamb, cooked vegetables, rosemary and smoked paprika. Bring the mixture to a gentle boil before lowering the heat and simmering.
The lamb is already cooked, so there’s no need for aggressive heat. A steady simmer gives the flavours time to come together without drying out the meat or reducing the vegetables to rubble.
Step four: Thicken and season the filling.
Combine the gravy powder or flour with cold water in a small bowl, stirring until completely smooth. Pour it into the simmering filling while stirring.
Continue cooking until the gravy thickens enough to coat the lamb and vegetables. Drag a spoon through the pan; the liquid should close over the gap slowly rather than rushing straight back in.
Taste before adding salt and pepper. Leftover roast ingredients can already carry a substantial amount of seasoning, particularly if you’re also using gravy powder. Remove the rosemary stems, then set the filling aside to cool.
Cooling is important. Hot filling begins melting the butter in the pastry before the pie reaches the oven, which can leave the base soft and greasy. The filling doesn’t need to be fridge-cold, but it shouldn’t be steaming.
Step five: Line and blind bake the pie base.
Heat the oven and lightly grease a pie dish. Roll the chilled dough between two sheets of baking paper until it is large enough to cover the base and sides.
Carefully ease the pastry into the dish without stretching it. Press it gently into the base and corners, then trim any large overhanging pieces. Prick the base with a fork.
Line the pastry with baking paper and fill it with baking weights or uncooked rice. Blind bake until the pastry is beginning to set, then remove the paper and weights and return it to the oven briefly so the base can dry.
This extra step is worth doing. The filling is moist, and an unbaked pastry base has a difficult job trying to cook beneath it.
Step six: Assemble the pie.
Spoon the cooled filling into the pastry case, spreading the lamb and vegetables evenly. Avoid pouring in excess liquid if your filling still looks particularly loose.
Brush the exposed edge of the shortcrust with beaten egg. Lay the puff pastry over the top, then press it onto the shortcrust to seal. You can use your fingertips or the back of a fork for a neat crimped edge.
Trim away excess pastry and cut a few small vents in the lid so steam can escape. Brush the top evenly with more beaten egg. If you have pastry offcuts, use them for simple decorations or freeze them for another bake.
Step seven: Bake until deeply golden.
Bake until the puff pastry is well risen and golden and the filling is hot throughout. Don’t rely solely on the cooking time: pastry can colour at slightly different rates depending on the oven and pie dish.
Allow the pie to stand for several minutes before cutting. The filling will settle and thicken slightly, which makes neater slices far more likely. Cutting immediately tends to release a gravy landslide. Still delicious, just less architectural.
How Do You Stop The Bottom Of A Lamb Pie Becoming Soggy?
Blind baking the shortcrust base and cooling the filling are the two most important steps.
A thick filling also helps. If the gravy is still runny when it goes into the pie, that liquid will soak into the pastry before the base has time to become crisp. Simmer it until it clings to the meat and vegetables rather than pooling around them.
A metal pie tin usually produces a crisper base than ceramic because it heats more quickly. Ceramic dishes still work well, but placing the dish on a preheated metal baking tray can help direct more heat towards the bottom.
Don’t stretch the pastry when lining the dish. Stretched pastry tends to shrink as it bakes, leaving shallow sides that can allow filling to spill between the crust and dish. Finally, make sure the oven is fully heated before the pie goes in. Puff pastry needs that initial burst of heat to rise and form separate, flaky layers.
Make The Filling Suit Your Leftover Lamb
The original seasoning on the meat should guide any changes you make to the filling.
For lamb roasted with garlic and rosemary, follow the recipe as written. Thyme can be added if you’d like a little more herbal flavour.
For Greek-style lamb seasoned with oregano and lemon, replace the rosemary with oregano or thyme.
For Middle Eastern-spiced lamb, leave out the rosemary and add a little cumin, coriander or allspice, depending on how the meat was originally seasoned.
For plain roast lamb, Worcestershire sauce can give the gravy greater savoury depth. Add a small splash, taste, and only then decide if it needs more.
You can also stir leftover gravy into the filling. Reduce the amount of stock accordingly and check the consistency before adding extra thickener. Homemade gravy may already provide everything the sauce needs.
Vegetable Substitutions And Useful Additions
This easy lamb pie recipe calls for cooked vegetables because they can be added directly to the filling without needing enough simmering time to soften. If you want to use raw vegetables, cook them with the onion or separately before adding the lamb.
Good options include:
- Roast potatoes or sweet potatoes
- Carrots and parsnips
- Pumpkin
- Peas, corn or green beans
- Mushrooms
- Cauliflower
- Broccoli
- Spinach or shredded kale
Frozen peas, corn and beans can generally be added without precooking because they heat quickly. Larger pieces of raw carrot, potato or pumpkin need to be cooked first.
Mushrooms are useful when you don’t have quite enough lamb. Cook them until their moisture has evaporated before adding the stock; otherwise, they can make the filling watery.
Leafy greens should be wilted and any excess moisture squeezed out. This is especially important with frozen spinach, which can harbour an astonishing amount of water for something that began as a small green leaf.
Pastry Options For The Leftover Lamb Recipe
Using shortcrust underneath and puff pastry on top gives the best balance of structure and flaky texture, but you can simplify the pie if needed.
For a quicker pot pie, skip the pastry base and spoon the lamb pie filling directly into a baking dish. Cover it with puff pastry, seal the edges and bake until golden. You’ll lose the crisp base but save the blind-baking time.
You can use frozen shortcrust for the base instead of making it. Blind bake it in the same way and keep it cold until you’re ready to use it.
All-shortcrust pastry also works if you prefer a firmer lid. It won’t rise like puff pastry but will give the pie a more traditional, sturdy finish.
I don’t recommend using puff pastry underneath a very wet filling unless you’re comfortable with a softer base. It can be done, but puff pastry performs much better when it has space to rise rather than being trapped beneath gravy.
What To Serve With The Lamb And Vegetable Pie
Because the lamb pie already contains meat, vegetables and pastry, it doesn’t need much alongside it. Steamed green beans, peas, broccolini or a crisp green salad are enough to turn it into a complete dinner.
For maximum cold-weather comfort, serve it with mashed potato and extra gravy. My 3-ingredient potato bake is another option if you really want to boost the carbs.
A Greek salad or vegetables dressed with a little lemon help balance the rich filling. Roast carrots, sautéed cabbage or a simple tomato salad would all work.
FAQs
Can I use lamb that has already been covered in gravy?
Yes. Add the lamb and its gravy to the pan, then reduce the amount of stock. Simmer the lamb pie filling and only add gravy powder or flour if it still needs thickening.
Can I make the lamb pie with leftover lamb chops?
Yes. Remove the meat from the bones and trim away excess fat before chopping it. The bones can be frozen and saved for stock if you have enough of them.
What if I don’t have three cups of lamb?
Use what you have and increase the vegetables. Mushrooms, potatoes, carrots and peas are particularly good for stretching the lamb pie filling without making it feel sparse.
Can I make leftover lamb pie without a pastry base?
Yes. Place the lamb pie filling in a baking dish and cover it with puff pastry. This quicker version is technically closer to a pot pie and avoids blind baking altogether. I often choose this option.
Do I have to cool the lamb pie filling before assembling the pie?
I strongly recommend it. Hot filling melts the butter in the pastry, making it difficult to handle and increasing the chance of a soft or greasy crust. But if you opt for a ‘bottomless’ lamb pie, then it’s not quite as important to cool the filling first.
How thick should the lamb pie filling be?
The gravy should coat the lamb and vegetables without running freely across the pan. Remember that it will thicken slightly as it cools.
Can I add leftover roast gravy?
Absolutely. Leftover gravy adds excellent flavour. Use it in place of some of the stock and adjust the seasoning and thickener after the lamb pie filling has simmered
What herbs go best with leftover roast lamb?
Rosemary and thyme are reliable choices for traditionally seasoned roast lamb. Oregano works well with Greek-style lamb, while cumin, coriander and a little allspice suit Middle Eastern flavours.
Can I use raw vegetables in the lamb pie filling?
You can, but they need to be cooked until tender before the filling goes into the pastry. The pie’s baking time is intended to cook the pastry and reheat the filling, not soften large pieces of raw potato or carrot.
Why did my puff pastry lid sink?
The lamb pie filling may have been too hot or wet, or the pastry may have become warm before baking. Cool the filling, keep the pastry chilled and make sure the oven is fully preheated.
Feedback and More: This leftover lamb pie recipe is comfort food with a purpose – one that saves food waste, saves money, and makes your leftovers taste like a whole new meal. Did you try the lamb pie? Leave a star rating ⭐⭐⭐⭐⭐ or comment below to let me know. Cheers, Elby!
There are many more dinner ideas, one pot meals, and pastry dishes for you to explore if you liked the lamb pie.
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Leftover Lamb Pie
*Note: Adjusting servings will not adjust the ‘light grey’ quantities
Ingredients
Pie Crust
- ¾ cup flour - plain, all purpose
- ¼ tsp salt
- 75 grams unsalted butter - cold
- 1 egg yolk
- 40 ml cold water - approximately
Pie Filling
- 1 tbsp vegetable oil
- 1 large onion - diced
- 2 cloves garlic - finely chopped
- 2 tbsp tomato paste
- 480 ml vegetable stock - salt-reduced
- 3 cups roast lamb - diced or shredded
- 3 cups vegetables - pre-cooked, diced in 1-2cm cubes (leftover veggies are perfect)
- 2 sprigs rosemary
- ½ tsp smoked paprika
- 1 tbsp gravy powder - or plain flour
- 2 tbsp water
- salt and pepper - to taste
Pie Topping
- 1 sheet puff pastry
- 1 egg - lightly beaten
Instructions
Pie Crust
- For homemade pastry, place the flour, salt, cold butter and egg yolk in a food processor. Process on low while gradually adding just enough cold water for the mixture to form a dough. It should hold together without feeling sticky.
- Shape the dough into a disc, wrap and refrigerate for 30 minutes while preparing the filling. If using frozen shortcrust pastry, thaw according to the packet directions and begin with the filling.
Pie Filling
- Heat the oil in a large saucepan over medium-high heat. Add the onion and cook for 2–3 minutes, or until softened.
- Add the garlic and cook for 30 seconds. Stir in the tomato paste and cook for another 30 seconds.
- Add the stock, lamb, cooked vegetables, rosemary and smoked paprika. Bring to the boil, then reduce the heat and simmer gently for 15 minutes.
- Mix the gravy powder or flour with the water until smooth. Stir it into the filling and simmer until the gravy has thickened. Remove the rosemary stems, season to taste and set the filling aside to cool.
Assembling and Cooking
- Preheat the oven to 190°C convention | 170°C fan-forced. Lightly grease a 22 cm pie dish.
- Roll the chilled shortcrust pastry between two sheets of baking paper into a round approximately 3 mm thick and large enough to cover the base and sides of the dish.
- Line the dish with the pastry without stretching it. If using frozen sheets, cut to fit the pie dish. Prick the base with a fork, line with baking paper and add baking weights. Blind bake according to the instructions in my shortcrust pastry post.
- Spoon the cooled filling into the pastry case. Brush the exposed pastry edge with beaten egg, then place the puff pastry sheet over the filling.
- Press the pastry edges together to seal and trim away the excess. Cut several small steam vents in the lid and brush evenly with beaten egg.
- Bake for 20-30 minutes, or until the filling is piping hot and the pastry is puffed and deeply golden. Rest for 5-10 minutes before serving.
Notes
Nutrition
*Nutrition and calorie figures are estimates only.
OMG, seriously good
So glad you liked it!