1/2 lb. margarine or butter
3 tsp. yellow mustard
3 tbsp. poppy seeds
1 medium minced onion
1 tsp. worcestershire
1 pkg. small dinner rolls
1/2 lb. ham
1/2 lb. Swiss cheese

Soften butter. Add ingredients except ham, cheese, rolls. Take rolls out of package and slice through the middle and open like a sandwich. DO NOT pull rolls apart. Spread the margarine mixture on the rolls. Place 1 slice thickness of ham on the rolls and 1 slice thickness of cheese, overlapping to a minimum. Place top of roll over bottom and replace in tray. Cover and refrigerate until ready to heat. Heat in 400° oven for 5 to 10 minutes.