2 pounds ground beef
1/2 cup chopped onion
1 teaspoon garlic powder
1/2 teaspoon salt
1/4 teaspoon black pepper
1/2 cup ketchup
3 tablespoons yellow mustard, divided
12 square dinner rolls
1 cup bread and butter pickles, drained
8 slices cheddar cheese
1/4 cup (1/2 stick) butter
2 tablespoons brown sugar
1 tablespoon Worcestershire sauce
1 tablespoon sesame seeds
Directions1.Preheat oven to 350 degrees F. Coat a 9- x 13-inch baking dish with cooking spray.
2.In a large skillet over medium-high heat, cook ground beef and onion 5 to 7 minutes, or until browned; drain excess liquid. Add garlic powder, salt, pepper, ketchup, and 2 tablespoons mustard; mix well and heat 2 minutes.
3.Place bottom half of buns in baking dish. Top with beef mixture, pickle chips, and cheese. Place top half of buns over cheese.
4.In a small saucepan over low heat, combine butter, brown sugar, Worcestershire sauce, sesame seeds, and remaining 1 tablespoon mustard. Heat 3 to 5 minutes, or until sauce is smooth, stirring occasionally. Pour sauce over buns, then cover with foil.
5.Bake 15 to 20 minutes, or until heated through and cheese is melted.