Terry'S Favorite Casserole
["1 medium onion, chopped", "1 lb. ground beef or turkey", "1 can stewed tomatoes, chopped in blender", "1 (10 3/4 oz.) can cream of mushroom soup", "1 small can tomato paste", "1 c. sour cream", "1 c. cheddar cheese, shredded", "1/2 lb. elbow macaroni"]
["Preheat oven to 375\u00b0.", "Brown meat with onions; drain.", "Cook macaroni according to package directions.", "Drain macaroni and return to pot.", "Add meat.", "Stir in tomatoes, soup, tomato paste and sour cream.", "Transfer to a 9 x 13 x 2-inch baking dish.", "Top with shredded cheese.", "Bake 25 to 30 minutes until hot through and bubbly."]
["onion", "ground beef", "tomatoes", "cream of mushroom soup", "tomato paste", "sour cream", "cheddar cheese", "elbow macaroni"]