1/4 lb. butter, at room temperature
2 tsp. prepared mustard
2 tbsp. poppy seeds
2 tsp. Worcestershire sauce
1 sm. onion, grated
1 (20 count) pkg. sm. party rolls
1 (4 or 5 oz.) pkg. boiled ham
1 (4 oz.) pkg. Swiss cheese

Mix together butter, mustard, poppy seeds, Worcestershire sauce and onion. Open rolls and spread mixture on both sides. Top each half with a small piece of ham and put a small piece of cheese between halves before closing. Heat in 350 degree oven until cheese is melted. Makes 20 small sandwiches. They can be frozen before being cooked.