2 tablespoons plus 1 stick butter, divided
1/2 cup mayonnaise
1 tablespoon yellow mustard
2 pack of Hawaiian King rolls, sliced in half
1 pound shredded roast beef
12 slices baby Swiss, cut in half
2 tablespoons thinly sliced green onions
1 tablespoon Lea & Perrins (Worcestershire sauce)
1 tablespoon light brown sugar
1/2 teaspoon garlic powder
Preheat oven to 350 degrees.
Using 2 tablespoons butter, grease two 13x9x2-inch baking dishes.
In a small bowl, combine the mayonnaise and mustard. Place the bottom half of each roll in prepared dishes (they should fit snugly); spread evenly with mayonnaise mixture.
Layer equal amounts of roast beef and 1 piece of cheese on top. Cover with the top half of each roll.
In a microwave-safe bowl, combine reserved 1 stick butter, green onions, Lea & Perrins, brown sugar and garlic powder. Cover and microwave on high until butter is melted.
Brush the tops of each roll with butter mixture. Pour the rest evenly over the sliders.* Sprinkle pepper over the tops of the sliders.
Cover with foil and bake for 15 minutes.
Remove foil and continue baking until tops are golden brown, 5-10 minutes more.