1 stick butter, softened
2 tsp. mustard
2 tbsp. poppyseed
2 tsp. Worcestershire sauce
1 sm. onion, grated
1 pkg. party rolls
1 (4 to 5 oz.) pkg. boiled ham
1 (4 oz.) pkg. Swiss cheese, grated

Mix first 5 ingredients together to make a spread. Spread both sides of rolls with mixture. Put on slices of ham with Swiss cheese in middle. Bake at 350 degrees until cheese melts. Slice rolls open with frozen food knife and cut rolls before baking.