Philly Beef Sandwiches - cooking recipe

Ingredients

2 medium onions, sliced
2 Tbsp. margarine or butter
6 hoagie or frankfurter buns, toasted
1 1/4 lb. thinly sliced, cooked roast beef
12 square American cheese slices

Preparation

Cook and stir onions until tender.
Set oven to broil.
Place bottom halves of buns on ungreased cookie sheet; top with onions and beef.
Cut cheese slices in half.
Place 4 halves on each sandwich.
Broil until cheese melts for 2 to 3 minutes.
Top each with remaining bun half.