Leftover Pot Roast Sandwich

Ingredients (8)

• 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 (I used this recipe
• 4 slices swiss cheese
• 1/4 cup mayonnaise
• 1 teaspoon whole grain mustard
• 1 teaspoon prepared horseradish