Porcupine Meat Balls
["1 lb. ground beef", "1/2 c. uncooked rice", "1/2 c. chopped onion", "1/2 c. chopped celery", "1/2 c. chopped green pepper", "1 egg, beaten", "1 Tbsp. Worcestershire sauce", "2 tsp. prepared mustard", "1 1/2 tsp. salt", "1/8 tsp. black pepper", "1/4 tsp. garlic powder", "1 can cream of mushroom soup", "1/2 c. water", "1/8 tsp. pepper", "1/2 tsp. salt (don't need)", "1/4 c. ketchup", "1/3 c. pasteurized cheese spread (Cheez Whiz)"]
["Combine the first eleven ingredients.", "Form into 1 1/2-inch balls.", "Place in lightly buttered 2 1/2-quart casserole."]
["ground beef", "rice", "onion", "celery", "green pepper", "egg", "Worcestershire sauce", "mustard", "salt", "black pepper", "garlic powder", "cream of mushroom soup", "water", "pepper", "salt", "ketchup", "pasteurized cheese"]