Leftover Roast Beef Cottage Pie

Leftover Roast Beef Cottage Pie is one of the best ways to use up Sunday lunch leftovers. A classic, comforting dinner, with deliciously tender chunks of leftover meat in a rich, tasty gravy.

I love a good cottage pie. Super comfort food, that’s as far as I’m concerned, the perfect mid-week family dinner. 

It’s filling, it’s got meat, veg and potatoes in one pot, and it’s all topped with cheese! Perfect!

Even better, cottage pie is so simple. There are no fancy ingredients, you can make substitutions easily, and there’s no complicated method. 

This blog post contains affiliate links, this means if you click on a link and go on to buy the product I recommend, I will get a small commission, but you will not be charged more.

The only thing that ever makes a cottage pie better in my opinion is if you make it with chunks of beef, instead of mince. 

Chunks of slow-cooked beef take on all the flavour of the rich gravy and fall apart in your mouth. The texture is just so much better than with mince. 

This is why making Cottage Pie with Leftover Roast Beef is always a fantastic idea!

baked cottage pie in cooking dish, bowl of peas and serving spoon on blue cloth.

How Should You Cut Leftover Roast Beef to Make Cottage Pie?

When it comes to the leftover roast beef, if you like your cottage pie with mince, you might want to shred the beef, or at least chop it as small as you can. 

However, I really like chunks of meat. I chop mine into fairly small cubes, around 1cm. I just love the texture of slightly chunkier meat. 

close up of cottage pie mix in cooking dish, without mash top.

It wouldn’t hurt if you wanted them bigger, especially if you’ve got quite a lot of leftover meat. 

Ingredients for Leftover Roast Beef Cottage Pie

When I make Leftovers Cottage Pie, I like to keep things really simple, just like when I make Traditional Cottage Pie.

As well as the chunks of beef, I add onions, carrots, and peas for some veggies. Then, the gravy is beef stock, red wine, tomato puree, Henderson’s Relish, and mixed herbs. 

Cottage pie mix without mash, in cast-iron cooking dish.

The red wine is optional, you can just add more stock instead, but I think it gives it a really yummy rich flavour. 

You can also add extra water if the stock and wine don’t cover the other ingredients. 

mash topped cottage pie in cast-iron cooking dish.

The mashed potato topping is just fluffy white potatoes, like King Edwards, mashed with butter, milk and a pinch of salt and pepper. I then top it all with mature cheddar. 

cottage pie topped with grated cheese in cast-iron cooking dish.

Cheddar cheese is ideal for Leftover Roast Beef Cottage Pie Recipe because it melts really well, but you can use mild instead if you prefer. 

cooked leftover roast beef cottage pie in cooking dish.

What Do You Bake a Cottage Pie in?

I bake my Cottage Pie Made from Leftover Roast Beef in a cast-iron dish (affiliate link). 

Because it’s both flame-proof and oven-proof, I can simmer the cottage pie middle on the hob, before topping with mash and cheese and baking in the oven, without having to change pans. 

If you don’t have anything suitable for both the hob and the oven, simmer your filling in a large frying pan (af link), before tipping into an ovenproof dish (af link) to bake once topped with mash and cheese. 

How to Make Cottage Pie with Leftover Roast Beef

This Recipe for Cottage Pie with Leftover Roast Beef is so easy.

leftover roast beef cottage pie in cast-iron dish. Empty bowls, serving spoon and bowl of peas surrounding.

It’s just a case of frying some onions, adding the beef, veg and the ingredients for the gravy and simmering for around an hour until it’s reduced, and the flavours have developed. 

Then top with creamy mash (prepare this while your pie filling simmers) and cheese and bake. 

What to Serve with Leftover Roast Beef Cottage Pie?

Perhaps one of the best things about Leftover Roast Cottage Pie is that it’s got everything. 

served portion of cottage pie with leftover roast beef.

You can serve with extra peas or more veg. But you can also just serve as it is. 

What Can You Make with Leftover Roast Beef?

I love cooking with leftover roast beef. Cooking the beef twice means that it’s super soft and gorgeous. Some of my other favourite recipes with leftover roast beef include:

Yield: 4 Servings

Leftover Roast Beef Cottage Pie

leftover roast beef cottage pie in cast-iron dish. Empty bowls, serving spoon and bowl of peas surrounding.

Leftover Roast Beef Cottage Pie is one of the best ways to use up Sunday lunch leftovers. A classic, comforting dinner, with deliciously tender chunks of leftover meat in a rich, tasty gravy.

Prep Time 1 hour 20 minutes
Cook Time 20 minutes
Total Time 1 hour 40 minutes


  • Cooking Spray (or 1tbsp oil)
  • 1 Red Onion – Finely diced
  • 500g Leftover Roast Beef – Chopped into small chunks
  • 250ml Red Wine
  • 4 Medium Carrots – Peeled and roughly sliced
  • 150g Frozen Peas
  • 500ml Beef Stock
  • 2tbsp Tomato Puree
  • Splash Henderson’s Relish
  • 2tsp Dried Mixed Herbs

For the Mashed Potato:

  • 1kg White Potatoes – Like King Edwards, peeled and cut into 2cm chunks
  • 100ml Milk
  • 50g Butter
  • Pinch Salt and Pepper
  • 200g Cheddar Cheese - Grated


  1. Heat the oil or spray in a large flame-proof dish, or frying pan on the hob
  2. Add the onions and fry for 5 minutes until soft
  3. Add the beef and red wine and stir together
  4. Bring to the boil, reduce the heat and simmer, stirring often for 3 minutes
  5. Add the carrots and peas and stir
  6. Pour in the stock, add the tomato puree, Henderson’s, and herbs, and add extra water if needed, to cover the meat and veg
  7. Bring to a simmer before reducing the temperature
  8. Simmer for around 1 hour, stirring often until the sauce has reduced and thickened
  9. While the sauce is simmering, prepare your potatoes by boiling them for around 20 minutes until soft, draining and mashing with the milk, butter and salt and pepper until smooth
  10. Preheat the oven
  11. Remove the pie mix from the heat, and transfer into an oven-proof dish if needed
  12. Top carefully with the mash and sprinkle over the grated cheese
  13. Bake in the oven for around 20 minutes until the cheese is bubbling and golden


  • Anything over 400g of leftover beef is enough. Any less than that and you might want to add extra veggies or reduce the other ingredients too.
  • If you can’t get Henderson’s use Worchester Sauce or skip.
  • I make my cottage pie in a cast-iron dish, which can be used on the hob and in the oven. If you don’t have anything like this, use a frying pan, and then transfer it into an oven-proof dish.

Nutrition Information:



Serving Size:

1 Serving

Amount Per Serving: Calories: 815Total Fat: 33gSaturated Fat: 18gTrans Fat: 1gUnsaturated Fat: 11gCholesterol: 142mgSodium: 1872mgCarbohydrates: 73gFiber: 9gSugar: 10gProtein: 47g

The nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors.

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