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Pot roast sliders on a cutting board with a blue gray background.

Leftover Pot Roast Sandwich

Next time you make a roast, save some for these Leftover Pot Roast Sandwiches. Topped with caramelized onions, cheese, and a little horseradish, this is a whole new way to do leftovers.
4.5 from 34 votes
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Prep Time: 5 minutes
Cook Time: 30 minutes
Total Time: 35 minutes
Servings: 4
Calories: 392kcal

Ingredients
 

  • 4 La Brea Bakery Frozen Take and Bake French Dinner Rolls
  • 2 teaspoons olive oil
  • 1 yellow onion (sliced)
  • 1 1/2 cups leftover pot roast (warmed)
  • 4 slices swiss cheese
  • 1/4 cup mayonnaise
  • 1 teaspoon whole grain mustard
  • 1 teaspoon prepared horseradish

Instructions

  • Preheat the oven to 385 degrees. Place the rolls on a baking sheet and bake according to package directions. Remove from the oven.
  • In the meantime, heat the oil in a non-stick skillet over medium low heat. Add the onion slices and toss to coat with the oil. Cook for 20-30 minutes, stirring occasionally, until the onions are soft and golden brown.
  • Slice the rolls in half. Pile each one with the pot roast, caramelized onions, and Swiss cheese. In a bowl, whisk together the mayonnaise, horseradish, and mustard. Slather about a Tablespoon of sauce on each sandwich. Wrap the sandwiches in foil (or just cover the baking sheet tightly with foil) and return to the oven for 5-10 minutes, or until cheese is melted and sandwiches are hot. Serve immediately.

Notes

  • Use any sliced or shredded leftover roast you have. I love to make a little extra at dinner to look forward to this sandwich!
Course Sandwiches and Burgers
Cuisine American
Keyword leftovers, shredded beef, slider, Swiss cheese

Nutrition

Calories: 392kcal | Carbohydrates: 16g | Protein: 27g | Fat: 24g | Saturated Fat: 7g | Polyunsaturated Fat: 7g | Monounsaturated Fat: 8g | Trans Fat: 0.03g | Cholesterol: 79mg | Sodium: 353mg | Potassium: 387mg | Fiber: 2g | Sugar: 2g | Vitamin A: 152IU | Vitamin C: 2mg | Calcium: 223mg | Iron: 3mg
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