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Leftover Roast Beef Sandwiches

These sandwiches are a great way to use up leftover roast beef! Inside buns, there's gravy dipped beef, horseradish sauce & melted Swiss cheese.
Prep Time10 minutes
Cook Time10 minutes
Total Time20 minutes
Course: Leftovers, Lunch
Cuisine: British, English
Servings: 4 Sandwiches
Author: Ben Racey

Equipment

  • Large Baking Dish
  • Baking Tray

Ingredients

  • 600 g Leftover Roast Beef (See Notes)
  • 350 g Gravy (See Notes)
  • 4 Burger Buns
  • 8 Swiss Cheese Slices
  • 4 tsp Horseradish Sauce

Instructions

  • Preheat an oven to 160°c/140°c fan (320°f/284°f).
  • Thinly slice the roast beef, season with salt & pepper then place into a baking dish.
  • Next, warm the gravy up in a pan (or in a microwave) then once hot, pour it all over the beef. Cover the dish with foil then bake in the preheated oven for 15-20 minutes, until piping hot.
  • When your beef is almost ready, cut the burger buns in half then toast them, either in a frying pan set over a medium heat or under a grill. Once toasted, place the bottom halves onto a baking tray.
  • Top each bun (just the bottom half!) with a teaspoon of horseradish sauce then spread it out to completely cover the bread.
  • Next, divide the slices of beef between the sandwiches, placing it on top of the horseradish.
    I'd recommend using a pair of tongs to lift the beef out of the gravy then spoon extra gravy into the sandwiches!
  • Top each sandwich with 2 slices of Swiss cheese then place under a grill for a minute or so, to melt the cheese. If you haven't got a grill, bake in the preheated oven for a couple of minutes, or use a blowtorch to melt the cheese.
  • Once the cheese is melted, top the sandwiches with the top half of each bun then serve.

Notes

1. Roast Beef - Any type of roast beef will work, I used topside! When making sandwiches, I find that it's best to slice the beef as thin as possible. 
2. Burger Buns - I used my roast potato burger buns for these sandwiches but feel free to use whatever type of bread you like.
3. Cooking In An Aga - To cook the beef in an Aga, bake it in the baking oven, on the bottom set of runners. Toast the buns on the simmering plate (on bac-o-glide). To melt the cheese, grill the sandwiches in the roasting oven, as high up as they'll go. 
4. Gravy - I used my red wine gravy but you don't have to use homemade! Gravy granules dissolved in boiling water will work as well.
5. Horseradish - You can use a homemade horseradish sauce or a shop bought one. It's up to you!