Meatball Mayhem Recipe Type: Entree Cuisine: American Author: Florence Ingredients 1/2 lb ground chuck 1/2 lb ground pork 1 1/2 Cups shredded Swiss cheese, divided 1 egg, slightly beaten 1 small onion, chopped 1 teaspoon celery salt 1/4 teaspoon nutmeg 1/4 teaspoon allspice 3 Cups cooked rice, divided 1 (10 oz) can cream of mushroom