1/2 lb. butter, softened
3 tbsp. poppy seed
1 tsp. Worcestershire sauce
3 tbsp. mustard
1 medium onion, chopped fine
3 pkg. party rolls
1 lb. ham
3/4 lb. Swiss cheese (in squares)

Blend butter, poppy seed, Worcestershire sauce, mustard and onion. Split packages of party rolls. Spread top and bottom with butter mixture. Place ham and Swiss cheese on rolls.

Bake at 400°F for 10 minutes or until cheese is melted.