Party Roast Beef Sandwiches

This easy roast beef slider recipe is perfect for make-ahead, bite-sized sandwiches.
Servings: 12
Yield: 12 sliders

INGREDIENTS:

½ cup prepared horseradish

1 (12 count) package Hawaiian bread rolls, split

12 slices deli roast beef

12 slices deli-sliced Swiss cheese

½ cup butter

1 onion, finely chopped

2 tablespoons brown sugar

1 tablespoon spicy brown mustard

1 ½ teaspoons Worcestershire sauce

1 pinch garlic powder, or to taste

2 teaspoons poppy seeds

DIRECTIONS:

Preheat the oven to 350 degrees F (175 degrees C). Grease a 9×13-inch baking dish.

Spread horseradish on the bottoms of the Hawaiian bread rolls. Top each with 1 slice roast beef and 1 slice Swiss cheese, then cover with top bread rolls. Place sandwiches in the prepared baking dish.

Melt butter in a saucepan over medium heat. Cook and stir onion, brown sugar, spicy mustard, Worcestershire sauce, and garlic powder in butter until onion is soft and translucent, about 5 minutes. Pour over sandwiches and sprinkle rolls with poppy seeds. Cover the dish with aluminum foil …