Em's Stuffed Mushrooms

Dice and saute in butter:
1/2 onion
2 stalks celery
stems from 3 pkgs. mushrooms

Cook 1 lb. of bacon and crumble. Mix all with 8 oz. softened cream cheese and 1 c. bread crumbs. Stuff the mushroom caps with mixture. Bake at 350 degrees for 13 minutes. Top with thin slice of monterey jack or mozzarella cheese and melt in oven.