Bud's Ham Biscuits

2 pans of pull off rolls

1 lb. Mozzarella cheese

2 lbs. cooked sandwich ham

2 sticks butter

3 T mustard

1 T poppy seed

1 T diced onions

Slice all of rolls through middle. Mix together last four listed ingredients. Spread on biscuits. Chop ham and spread over rolls. Put sliced cheese over ham. Place other half of roll on top. Cover with aluminum foil. Bake at 350 for 20 minutes. Let cool for about 5 minutes.