6 tbsp. soft butter
1 tbsp. prepared mustard
1/2 tsp. Worcestershire sauce
2 tbsp. finely chopped onion
1/2 lb. chipped ham
6-8 slices Swiss or American cheese
6-8 hamburger rolls

1. Preheat oven to 375 degrees.

2. Chop the onion and combine with the mustard, butter and Worcestershire sauce in a medium bowl. Cream together until well blended.

3. Spread the butter mixture on both halves of a hamburger bun.

4. Cut cheese slices diagonally. Place 1/2 slice on each roll. Divide the ham evenly and place on each roll.

5. Wrap in foil and bake 10 to 15 minutes.