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My Leftover Roast Beef Sandwich Recipe will change the way you use roast beef leftovers! This easy ciabatta sandwich recipe, complete with homemade remoulade sauce, cream cheese, and caramelized onions, is the best way to use leftover roast beef.
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Best Roast Beef Sandwich Recipe
Roast beef is one of my family's favorite dinners, whether we're enjoying a prime rib for the holidays or a pot roast during the week. But, with any roast beef recipe, there are always leftovers!
One of my personal favorite ways to use leftover roast beef is to make a hot roast beef sandwich. There is nothing quite like a super flavorful sandwich with roast beef leftovers. Even better if you make the sauce and toppings from scratch!
This leftover roast beef sandwich recipe is my secret to getting the most out of leftovers. I make it using a homemade remoulade sauce and caramelized onions, and it stands out as the best beef sandwich I have ever had. It's amazing for pot roast or as an idea for Prime Rib Leftovers.
I guarantee you will feel the same way with just one bite!
Hot Roast Beef Sandwich FAQ
Classic roast beef sandwiches include cheese and onions, which is what led to the creation of my roast beef sandwich recipe. Cream cheese is an incredible choice for a roast beef sandwich, paired with spicy remoulade sauce and homemade caramelized onions. Optionally, you can add a tomato. Serve it all on a sandwich roll such as ciabatta, and enjoy.
Roast beef pairs well with blue cheese, cheddar, asiago, fontina, gouda, and creamy cheese sauces. Cream cheese is an amazing replacement for sliced cheese on a roast beef sandwich, as it pairs perfectly with the beef.
You can use any leftover roast beef to make roast beef sandwiches. The typical choice for sliced roast beef on a sandwich is deli-style roast beef made using top loin, eye of round roast, and top sirloin. However, you can even use leftover pot roast to make this sandwich recipe.
Whether you enjoy a roast beef sandwich hot or cold is up to preference. You can serve this recipe as a hot roast beef sandwich by toasting it after assembling.
Roast Beef Sandwich Ingredients
- Sandwich rolls of choice (I recommend ciabatta)
- Cream cheese
- Remoulade sauce
- Caramelized onions
- Tomato (optional)
- Leftover roast beef - try one of my roast beef recipes
How to Make a Roast Beef Sandwich
- Prepare caramelized onions and remoulade sauce (store-bought can also be used).
- Spread cream cheese on the bottom roll of your sandwich bun.
- Add slices of leftover roast beef, or leftover shredded roast beef, over the cream cheese.
- Top with caramelized onions, then tomato (optional).
- On the top bun, spread remoulade sauce. Join the sandwich, cut in half, and serve!
Variations
Remoulade sauce and caramelized onions are not the only way you can enjoy an incredible leftover roast beef sandwich recipe! Here are a few of my favorite variations on this leftovers sandwich:
- Roast beef sandwich with horseradish sauce: Prepare creamy horseradish sauce to use as sauce for the sandwich (no cooking required). Pair with cheddar cheese and arugula, and enjoy cold or as a hot roast beef sandwich by warming it slightly.
- Arby's roast beef sandwich/Arby's beef and cheddar: Make your homemade roast beef sandwich into one like the classic from Arby's by preparing it with a toasted sesame seed bun, cheddar cheese sauce (see: how to make cheese sauce), and copycat red ranch sauce. To make the red ranch sauce, combine ½ cup ketchup with 3 Tablespoons red wine vinegar or apple cider vinegar, ⅛ teaspoon garlic powder, ⅛ teaspoon onion powder, and 3 Tablespoons sugar. Double for enough to make 4 sandwiches. For best results, heat in a saucepan over medium-heat after mixing, then cool. Alternatively, use a variety of Country French dressing.
- Au jus sandwich: Make it a french dip sandwich by heating au jus sauce for dipping and serving it hot with melted provolone, Swiss, or Mozzarella cheese.
What to Serve with a Roast Beef Sandwich
- A nice green side salad
- Serve with roasted vegetables, like carrots, broccoli, or asparagus on the side
- Try adding steakhouse mushrooms
- Serve with roasted potatoes or chips
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📋 Recipe
Best Roast Beef Sandwich Recipe using Leftovers
Equipment
- 1 Knife
- 1 pan for making caramelized onions
Ingredients
- 1 sandwich roll I recommend ciabatta
- ¾ Tablespoon cream cheese
- ¾ Tablespoon remoulade sauce
- 1 Tablespoon caramelized onions
- 1 slice tomato optional
- 3-6 slices roast beef leftover roast beef or deli roast beef
Instructions
- Prepare caramelized onions and remoulade sauce (store-bought can also be used).
- Spread cream cheese on the bottom roll of your sandwich bun.¾ Tablespoon cream cheese, 1 sandwich roll
- Add slices of leftover roast beef, or leftover shredded roast beef, over the cream cheese.3-6 slices roast beef
- Top with caramelized onions, then tomato (optional).1 Tablespoon caramelized onions, 1 slice tomato
- On the top bun, spread remoulade sauce. Join the sandwich, cut in half, and serve!¾ Tablespoon remoulade sauce, 1 sandwich roll
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