Prep Time: 10
Cook Time: 2
Serves: Serves: 4
Cook onion and pepper, if desired, in butter in medium skillet 5 minutes or until softened. Split rolls almost all the way through. Layer meat and onion mixture in rolls; top each with cheese slice. Place on baking sheet or broiling pan.
Place under preheated broiler 5 inches from heat; broil 2 minutes or until cheese is melted.