2 tbsp. mustard
2 sticks butter, melted
3 tbsp. poppy seeds
1 onion, grated
1 tbsp. Worcestershire sauce
3 pkg. small Denver rolls
3 oz. boiled ham, diced
3 oz. Swiss cheese, grated

Combine first 5 ingredients in bowl; mix well. Cut roll in half. Spread sauce over bottom half of rolls. Sprinkle with ham and cheese. Cover with top half of rolls. Cover and bake at 350°F for 10 to 12 minutes. May be frozen and reheated.