1 stick butter
3 tbsp. prepared mustard
1 1/2 tsp. poppy seed
1 tsp. Worcestershire sauce
1 med. onion, chopped fine
8 slices Muenster cheese
16 slices ham
8 hard rolls

Combine all ingredients, except cheese, ham, and rolls. Spread mixture on both sides of rolls. Place 1 slice cheese, 2 slices ham on each roll. Wrap prepared rolls in foil. Heat 20 minutes at 300 degrees. Serves 8.