3 pkgs. party rolls
4 oz. Swiss cheese
8 oz. sliced ham

FILLING:

2 sticks soft butter
3 tbsp. mustard
1 tbsp. Worcestershire sauce
1 med. onion, grated
3 tbsp. poppy seeds

Mix the filling ingredients together and set aside. Slice rolls in half. Spread filling on both sides. Put ham and cheese on each bottom piece and replace the top. Bake, uncovered at 350 degrees for 10 to 15 minutes.