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Monday Pie. How to make the most delicious Monday pie using your roast dinner leftovers in the slow cooker. Then how to transform your Monday pie leftovers into a delicious Tuesday Carbonara. Works well with leftover roast beef, roast turkey, roast chicken, roast ham, or roast lamb.

Our Monday pie was originally shared on Recipe This in 2018. This is the updated version with more photos and including our delicious Tuesday Carbonara.

slow cooker monday pie in the crockpot
slow cooker monday pie
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Monday Pie

Can we talk leftovers? Yes, I know I have featured many of them on here before, but I am a leftover junkie and get a HUGE buzz out of exciting recipes made from fridge leftovers.

We will be sat at the dinner table and our grown up son will be joining us. He is 19 years old and pretends he has an appetite like Joey out of Friends when he doesn’t.

Then I will watch to see how much more roast dinner he will go back for, because I am secretly thinking in my head what I can make with the leftovers.

My favourite use of leftovers is roast dinners. That is because you have lots of different flavours going on and you can mix and match to make great meals.

It might be for the next day or for the freezer for another time.

If I were to choose my top leftover meal it would be our air fryer turkey burgers, that are made from leftover Christmas dinner grub.

Or the same leftovers transformed into Boxing Day Soup.

But the greatest thing about the Monday pie, is that it can be used with any leftover roast dinner and doesn’t just have to be reserved for one type of meat.

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What Is Monday Pie?

Monday Pie is a famous leftover roast beef pie in the United Kingdom that many families enjoy so that they can save money.

The idea behind Monday Pie is that you use up everything that you have left over from your Sunday roast dinner the day before, fill it out with fillers such as extra potato or beans and then serve it up as a delicious leftover meal.

For many families though (myself included) its not necessarily about the saving money element, even though that is of course nice!

It’s about the fact that you can prepare a delicious evening meal the night before, in the middle of doing your washing up.

Then the next day you simply grab your Monday Pie filling from one bowl in the fridge and load into the slow cooker.

Then you grab your leftover mashed potatoes from another and load it all up.

Come back at dinner time and you have Monday pie!

Of course, Monday Pie is whatever you want it to be. You could use up leftover roast turkey, roast pork, roast beef, roast duck, roast chicken or even leftover mince.

Our Monday Pie Ingredients

monday pie ingredients

I am taking you behind the scenes of one of the Monday meat pies we made in the Milner house. We enjoyed a roast pork dinner and here is what we enjoyed on the Sunday dinner table:

  • Pork Roast
  • Yorkshire Puddings
  • Mashed Potato
  • Vegetable Bake
  • Stuffing
  • Pork Gravy

We had quite a bit of potatoes left, a decent amount of pork, but the rest of it was small portions. But when combined made a big Monday Pie.

Just think about the roast dinner you have it home and how you could bulk it up and what you could include in your own Monday Pie.

My mum always said to me that “my world is my oyster” well your Monday Pie is your oyster.

Think outside the box of what you have leftover and what extra cheap sides you can add to your roast dinner to make your Monday pie super successful.

How To Make Monday Pie?

slow cooker monday pie step by step

The quick version of making Monday pie goes as follows:

  1. Mix ingredients with your hands and load into your slow cooker. Leave in the fridge overnight.
  2. Load up your slow cooker Monday pie filling with mash.
  3. Cook + eat.

There is a little more to it than that, but those are the simple basics!

Monday Pie On Slimming World

All you are doing is using up leftovers from the day before. Maybe bulking it up a little if you don’t have enough to stretch.

Therefore, if you are on Slimming World, then use your Slimming World friendly food from the day before.

Tuesday Carbonara

Tuesday carbonara

I love using up every bit of food that is leftover, so no wonder we ended up with a Tuesday carbonara too.

I love creamy sauces and a carbonara from spare meat and vegetables is do delicious.

What I did to make a Tuesday carbonara was:

  1. One leftover ladle of Monday pie including some mash was blended to make a creamy carbonara sauce.
  2. I added a little white wine, some parsley and some salt and pepper to make a thick carbonara sauce.
  3. I then added some more of the leftover meat I had not used.
  4. Added in bacon, spinach, fresh tagliatelle, grated cheese, and frozen sweetcorn.

Just like that I had Tuesday carbonara and it was like a new meal in itself and so delicious.

The sauce was gluten free and the potatoes were the thickener to make it wonderfully creamy.

Plus, this is exactly what I do with leftover turkey and turn it into a mix between a carbonara or a stroganoff.

Monday Pie
5 from 3 votes

Slow Cooker Monday Pie

Monday Pie. How to make the most delicious Monday pie using your roast dinner leftovers in the slow cooker. Then how to transform your Monday pie leftovers into a delicious Tuesday Carbonara. Works well with leftover roast beef, roast turkey, roast chicken, roast ham, or roast lamb.
Prep Time: 10 minutes
Cook Time: 3 hours
Total Time: 3 hours 10 minutes
Servings: 4
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Kitchen Gadgets:

Monday Pie Ingredients:

  • 500 g Leftover Roast Dinner
  • 50 g Frozen Peas
  • 150 ml Whole Milk
  • Salt & Pepper


  • Grab all your roast dinner leftovers (excluding the mash) and load it into your slow cooker bowl. Mix well with your hands and place in the fridge for the night. In a separate container fridge your mash overnight too.
    How To Make Monday Pie
  • The following day add frozen peas, whole milk and salt and pepper to your slow cooker pot.
    How To Make Monday Pie
  • Place your mash over so that all gaps are covered.
    How To Make Monday Pie
  • Slow cook on low for 3 hours until your pie is piping hot. Load onto dinner plates and if you have a ladle worth left over, reserve this to make our Tuesday Carbonara.
    How To Make Monday Pie


Swaps. We used pork in the example and in another of our examples, turkey. You can use any leftover roast dinner. Beef and lamb also work very well.
Peas. I recommend adding in some frozen peas to bulk it up.
Thick. Note that the pie goes incredibly thick when left in the fridge overnight. Add some whole milk prior to cooking to make it creamy.
Thanks for reading our Monday pie recipe on Recipe This. We have many more slow cooker recipes for you to check out next. If you would like to try more leftover recipes, then try our leftover hunters chicken.


Calories: 208kcal | Carbohydrates: 4g | Protein: 30g | Fat: 7g | Saturated Fat: 3g | Cholesterol: 81mg | Sodium: 87mg | Potassium: 506mg | Fiber: 1g | Sugar: 3g | Vitamin A: 156IU | Vitamin C: 5mg | Calcium: 69mg | Iron: 3mg
Like this recipe? Rate and comment below!

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About Sam & Dom

Hi! I am Sam and along with my chef hubby Dom we love sharing with you easy everyday recipes using kitchen gadgets. We are also the authors of The Complete Air Fryer Cookbook, an amazing air fryer cookbook filled with 140+ everyday air fryer recipes.

Beyond the air fryer we also love the instant pot, slow cooker, soup maker, ninja foodi, pie marker and several other kitchen gadgets.

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Recipe Rating


  1. 5 stars
    Made this several times and its the best thing after we have enjoyed a roast dinner. My favourite meat to do it with is gammon.

  2. 5 stars
    Thanks so much Samantha. I love the amazing leftover meals that you make and the Tuesday carbonara is genius.