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Hearty open-faced roast beef sandwich smothered in rich gravy, topped with melted cheese and served with a side of mashed potatoes.

Roast Beef Sandwich

A classic, comforting dish featuring tender roast beef, melted cheese, and caramelized onions on toasted sourdough bread. Served with horseradish sauce and warm au jus for dipping, this sandwich is perfect for a quick lunch or hearty dinner. Easy to customize and ready in just 15 minutes!

  • Total Time: 15 minutes
  • Yield: 2 sandwiches 1x

Ingredients

Scale

For the Sandwich:

  • 4 slices of sourdough bread (or rye/crusty artisan bread)
  • 8 oz roast beef (freshly cooked or deli-sliced)
  • 4 slices provolone cheese (or cheddar/Swiss)
  • 1/4 cup horseradish sauce (or Dijon mustard)
  • 1/2 cup caramelized onions (optional)
  • 1/2 cup gravy or au jus (for dipping)

For Toppings (Optional):

  • Fresh lettuce
  • Sliced tomatoes
  • Pickles
  • Fresh herbs (parsley, chives, or thyme)

Instructions

  1. Toast the Bread
    • Lightly toast or grill the bread slices to prevent sogginess.
  2. Warm the Roast Beef
    • Heat the roast beef in a skillet or microwave until warm.
  3. Layer the Ingredients
    • Spread a thin layer of horseradish sauce or mustard on each slice of bread.
    • Add a layer of roast beef, followed by caramelized onions (if using).
    • Top with a slice of cheese.
  4. Melt the Cheese
    • Place the assembled sandwiches under a broiler for 1-2 minutes, or until the cheese is melted and bubbly.
  5. Add Toppings
    • Garnish with fresh lettuce, tomatoes, pickles, or herbs as desired.
  6. Serve
    • Serve immediately with a side of warm gravy or au jus for dipping.
  • Author: Victoria
  • Prep Time: 10 minutes
  • Cook Time: 5 minutes

Nutrition

  • Serving Size: 2 servings