Leftover roast beef sandwich with easy homemade mayo as seen in this recipe.

Delicious Homemade Leftover Roast Beef Sandwich Recipe

Delicious Homemade Leftover Roast Beef Sandwich Recipe

This delicious homemade leftover roast beef sandwich recipe will show you the very best way to make the most of yesterday’s Sunday lunch leftovers! We will help you to take that leftover roast beef sandwich and take it up a notch. We will also cover a delicious, easy mayonnaise recipe and a few handy tricks that make all the difference.

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Introduction

There’s something about roast beef. The joy of a huge, warm slab of perfectly pink roast beef is incomparable. That’s why our traditional Sunday roasts are still such a huge part of our lives. There’s just something about lazing your way through a Sunday and enjoying a big, tasty plate of perfectly cooked comfort food. If you’d like to try something else with your roast beef, you could always give this roast topside with bone marrow, caramelised onion and mash recipe. It’s different, but it’s absolutely delicious!

Then there are the leftovers. In many ways, the leftovers are one of the best parts of a good Sunday roast. We live in a world where bubble and squeak is more appreciated than ever. You can rustle it all up together in a pan and have it for dinner the next day. Or, with just a little finesse, you can roll it all up, breadcrumb it and deep fry it into croquettes. There are all manner of available options to cover your potatoes and veg.

When you get a little hungry in the evening, you can take one of those gorgeous Yorkshire puddings, fill it with stuffing, top it with cauliflower cheese and then soak it in gravy. That’ll keep you going. Well, maybe one more … Ok, two.

Finally, there’s the beef. You’re going to take another couple of slices after you’ve finished dinner. That much is a given. But what to do with the rest? You could make a curry or a stew. You could even stuff it into one of those dirty yorkies or mix it in with the bubble and squeak. Or you could make a wonderful, beefy, crispy sandwich and enjoy it for lunch the next day. That’s what we’re going to do here!

About this recipe

First and foremost, I’m sure we all know how to make a leftover beef sandwich without following a recipe. As is the case with most of my posts, this leftover roast beef sandwich recipe is really all about the extra little touches that go into it. As well, we will use a very easy homemade mayonnaise recipe to make the mayo ourselves. Then, we’ll caramelise the onions with a good punch of flavour. We will also make those ever-important steps like toasting the bun and seasoning the salad. It matters! That’s what’s going to make the world of difference to your sandwich.

As one final note, I made this sandwich with a slice of the loaf I made in my simple home made white bread recipe. It would also go perfectly well in one of these beautiful brioche buns.



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Subscribe to my newsletter now for a free guide to cooking curries! AND I’ll send you weekly tricks, tips and updates that will help you elevate your cooking to the next level!


Leftover roast beef sandwich with easy homemade mayo as seen in this recipe.

Delicious Homemade Leftover Roast Beef Sandwich Recipe

This delicious homemade leftover roast beef sandwich recipe will show you the very best way to make the most of yesterday's Sunday lunch leftovers! We will help you to take that leftover roast beef sandwich and take it up a notch. We will also cover a delicious, easy mayonnaise recipe and a few handy tricks that make all the difference.
Prep Time 10 mins
Cook Time 5 mins
Course Lunch, Main Course, Snack
Cuisine English
Servings 1

Ingredients
  

Caramelised Onions

  • Butter
  • 1 Lrg Onion
  • 1 Star Anise Optional
  • Salt
  • 1 tsp Caster Sugar

Mayonnaise

  • 1 Egg
  • 1/2 tsp Mustard
  • 1 tsp White Wine Vinegar
  • 50 ml Neutral Oil sunflower, vegetable or non-virgin olive
  • Lemon Juice
  • Salt

Sandwich

  • Bread
  • Butter
  • Leftover Roast Beef
  • Lettuce
  • Mustard
  • Salt
  • Pepper

Instructions
 

Caramelise the onions

  • Melt a good wedge of butter in a pan on low-medium heat.
  • Peel and slice up your onion. No need to dice it too finely. Add it to the pan.
  • Add the star anise as well, and a little salt.
  • Cook this, stirring frequently, for about half an hour, until the onion caramelises and appears almost to melt.
  • Remove the star anise and test the seasoning. Add more salt if necessary and if desired, add a little sugar.

Make the mayo

  • Crack the egg into a bowl and mix the yolk and white with an electric whisk.
  • Add a dash of vinegar and half a teaspoon of mustard and mix again, very thoroughly.
  • Add a tiny bit of the oil and mix.
  • Continue to add oil as you mix, a tiny bit at a time, until you've added the whole 50ml.
  • Season with salt and optionally lemon juice.

Build the sandwich

  • Cut two slices of bread and butter both sides of both slices.
  • In a dry pan on high heat, sear both sides until they turn a beautiful golden brown.
  • On the inside of one of those slices of bread, spread a thick layer of the mayonnaise.
  • On the other, spread a thin layer of mustard. Or a thick layer, depending on your mustard tolerance.
  • Finely, finely slice some lettuce and chop it up a little, then add it to the bottom piece of bread.
  • You can, if you like, season and dress the lettuce. I like to use a little salt and lemon juice.
  • Spoon the caramelised onion over the top of the lettuce.
  • Make a few very fine slices of beef, ideally somewhere in the middle, where the beef is still nice and pink. Fold them down gently into the sandwich. Try to keep them fairly loose.
  • Season the beef if necessary with a little salt and optionally a little pepper.
  • Put the sandwich together and slice it down the centre.
Keyword Leftover Beef, Leftover Beef Recipe, Leftover Beef Recipes

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