1 stick butter melted
4 T prepared mustard
1 teaspoon worcestershire sauce
1/2 cup minced onion
2 teaspoons poppy seeds
1/2 teaspoon horseradish
Melt butter & add all other ingredients. Cool slightly, until spreadable.
Spread on both sides of tea buns. Add ham & Swiss cheese slices. Place in baking dish or on cookie sheet, & cover with foil. Bake at 350 degrees for 15 minutes.