2 med. onions, sliced
2 tbsp. butter
6 hoagie buns, split and toasted
12 slices American cheese

Cook and stir onions in butter until tender (10 minutes). Set oven to broil. Place bottom halves of buns on ungreased cookie sheet. Top with onions and beef. Cut cheese slices into halves, diagonally.

Place 4 halves on each sandwich. Broil with tops 5-6 inches from heat just until cheese is melted (2-3 minutes). Top each with remaining bun half. 6 sandwiches