My mom is a HUGE fan of these, and I am making them for Cannon's birthday! I found this on http://www.kellyskornerrecipes.blogspot.com/
1 pkg 24 party rolls (or I used 2 pkgs of 12 dinner rolls)
1/2 stick butter, melted
4 tablespoons poppy seeds
4 tablespoons mustard
4 tablespoons Worcestershire sauce
In a bowl - mix together the butter, poppy seeds, mustard and Worcestershire sauce.
Spread sauce on both sides of rolls and put a piece of ham and cheese on each
Cover and bake at 350 for 15-20 minutes or until cheese melts.