Porcupines En Casserole
["1 lb. lean ground beef", "1/2 c. uncooked rice", "1/2 c. each: chopped onion, celery, green pepper", "1 egg", "1 Tbsp. Worcestershire sauce", "2 tsp. prepared mustard", "2 tsp. salt or less", "1/4 tsp. pepper", "1/4 tsp. garlic powder", "1 can cream of mushroom soup", "1/2 c. water", "1/4 c. tomato catsup", "1/3 c. grated cheese"]
["Combine first 8 ingredients, plus 1 1/2 teaspoons salt, 1/8 teaspoon pepper and garlic powder.", "Form into balls and place in greased casserole.", "Combine soup, water, catsup, remaining salt and pepper.", "Bring to boil; pour over meat.", "Cover.", "Bake at 350\u00b0 for 1 hour.", "Remove from oven and stir in cheese."]
["lean ground beef", "rice", "onion", "egg", "Worcestershire sauce", "mustard", "salt", "pepper", "garlic powder", "cream of mushroom soup", "water", "tomato catsup", "grated cheese"]