1 to 1 1/2 pkgs. ham
1 lg. pkg. dinner rolls
1 lg. pkg. Swiss cheese or Parmesan cheese

SAUCE:

1 stick butter
1 tbsp. minced onion
1 tsp. mustard
1 tsp. Worcestershire sauce

Split rolls and put ham and cheese between rolls. Place in baking dish. Spoon sauce over rolls and bake 15 minutes at 300 degrees.