1/2 lb. butter (2 sticks)
3 tbsp. prepared mustard
3 tbsp. poppy seeds
1 sm. onion (grated or finely chopped)
1 tsp. Worcestershire sauce
1 lb. ham, very thinly sliced
1/2 lb. Swiss cheese
3 pkg. rolls on tray

Slice rolls in half, with long blade knife, all at once while they are attached. Melt butter, add all ingredients except ham and cheese. Spread mixture on both sides of rolls. Add ham and cheese, put rolls together and return to tray rolls came in. May be frozen at this point.

Heat 10-12 minutes at 400 degrees or 30-45 seconds on high in microwave. Allow to thaw or increase time if frozen. These are equally delicious with turkey or Cheddar, mozzarella or Monterey Jack cheese.