Preheat oven to broil and place baking rack in middle of oven. Prepare a baking sheet with foil. Divide ground beef into 8 equal portions. Place rolls face up on baking sheet and form a patty of hamburger on each roll. Score the top of the burger patty, criss-crossing twice. Drizzle Worcestershire sauce on each patty then season each with garlic salt and pepper. Top each patty with a tablespoon pat of butter. Place in the oven and broil for 10 minutes for medium rare. Add a slice of cheese to each burger and cook for 2 minutes more. Remove from oven and serve immediately with salad.