Preheat oven to 350.
Grease a cookie sheet lined with foil. Combine butter, mustard, Worcestershire sauce, brown sugar, poppy seeds, and dried onions.Slice the rolls to make sandwiches. Remove tops and set aside.

Place the bottom pieces into the sprayed cookie sheet
Layer the ham onto the rolls. Top the ham with the Swiss cheese. Place the tops of the rolls onto the sandwiches. Brush the liquid mixture evenly over the rolls..

Bake 18-20 minutes or until the rolls are lightly browned and cheese has melted.
Separate into individual sandwiches to serve