Looking for a delicious way to use up that leftover roast beef from our Beef and Yorkshire Pudding cooking class? This Beef & Cheddar Sandwich on a toasted brioche bun is the perfect solution! Packed with savory flavors and cheddar cheese, this sandwich transforms your roast beef into a mouthwatering, easy-to-make meal. Perfect on nights when you are running your kids to sports or you have no time to spend in the kitchen.

Hot beef sandwiches have long been a comfort food staple, tracing their roots back to early diners and delis in the United States. Known for their rich, satisfying flavors and heartiness, these sandwiches became a go-to for anyone craving a quick, filling bite. Our version adds a modern twist with the addition of a soft, buttery brioche bun and sharp cheddar, elevating this classic to gourmet status.

Whether you're looking for a quick lunch or a satisfying dinner, this Beef & Cheddar Sandwich is an ideal way to make the most of your leftovers while indulging in a timeless favorite. Read on for the full recipe and some tips on how to get that perfect melty cheese and crispy toasted bun!

Assuming all of the gravy was gobbled up with the delicious Yorkshire Pudding a couple, for this recipe we will show you how to build flavour from scratch and without the fond (delicious brown bits on the bottom of the pan after roasting the beef)

Ingredients:

1/2 - 3/4 lb cooked roast beef, thinly sliced 
2 Tbsp butter + more to butter toast the buns
1 medium onion, julienned
2 Tbsp all-purpose flour
2 cups good quality beef stock
1 cup grated cheddar cheese, or your favourite cheese
salt & pepper to taste
4 brioche buns

1. Pre-heat a frying pan on medium heat. Add julienned onions, stir to coat in the melted butter. Season generously with salt (& pepper if you would like). Allow onions to cook without stirring. This will allow the onions to pick up colour from the heat and begin to caramelize. 
2. Continue to cook until onions are softened and caramelized. Sprinkle 2 Tbsp of flour over the onions, stirring to even coat. Cook for 30 seconds-1 minute to cook out some of the starch.
3. Add beef stock and whisk to until thickened. Cook on a gentle simmer for 3-4 minutes, adjust consistency with a small amount of water if needed. Season generously with salt or to taste.

Bringing the sandwich together. 

1. Pre-heat a pan on medium heat. Butter the inside of the brioche bun and place butter side down until warm and golden brown. 
2. Place on plate. Spread your favourite mayonnaise on bottom of bun. 
3. Add slices of roast beef, season with salt and pepper.
4. Top beef with cheddar and a couple of generous spoonfuls of the onion pan gravy.
5. Enjoy!

Learn how to make the most delicious
 Roast Beef & Yorkshire Pudding!