Ingredients
Equipment
Method
- Preheat oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish.
- In a skillet over medium-low heat, heat olive oil. Add sliced onions and cook slowly until caramelized (about 15-20 minutes). Stir in minced garlic during the last minute. Season with salt and pepper.
- Without separating the rolls, use a serrated knife to slice the entire sheet of slider buns in half horizontally. Place the bottom half in the baking dish.
- Layer half of the provolone cheese over the bottom buns. Evenly layer the thinly sliced roast beef over the cheese. Spread the caramelized onions on top of the beef, then add the remaining provolone cheese. Place the top half of the buns over the cheese.
- In a small bowl, whisk together the melted butter, Dijon mustard, and Worcestershire sauce. Brush this glaze generously over the top of the slider buns.
- Cover the baking dish with foil and bake for 15 minutes. Remove foil and bake another 5-10 minutes until the tops are golden brown and crispy.
- Slice into individual sliders and serve immediately alongside warm beef broth for dipping.
Notes
To make ahead, assemble the sandwiches in the dish but wait to apply the butter glaze until right before baking to prevent soggy buns.