4 (20 ea.) pkgs. party rolls
2 sticks butter, melted
3 tbsp. poppy seed
3 tsp. prepared mustard
4 c. ground ham
1 sm. onion
1 tsp. Worcestershire
1/3 lb. Swiss cheese (use cheese WITHOUT holes)

Split whole package of rolls at a time. Mix together and spread on bottom the next 3 ingredients. Mix ham, onion, and Worcestershire and place on above. Sprinkle with cheese. Replace to rolls; wrap in foil. Bake at 400 degrees until hot and cheese melts.