1 (7 1/2 oz.) pkg of rolls (the ones packaged in foil)
4 - 6 thin slices ham
4 - 6 slices swiss cheese
1/2 c. butter
1 1/2 tsp. dry mustard
1 tsp. worcestershire sauce
2 tsp. poppy seeds

Place rolls in freezer 30 minutes to one hour ahead of time. Slice entire package of rolls horizontally. Place ham on bottom section of rolls. Top with cheese. Replace roll tops. Melt butter; add other ingredients and stir. Pour over rolls (pull out sides of pan). Refrigerate overnight. Bake at 350 degrees for 12 to 15 minutes or until thoroughly heated and cheese melts.