Beef Casserole Italiano
["1 lb. ground beef (lean)", "1/4 c. chopped yellow onion", "2 cans (8 oz. each) tomato sauce", "1 tsp. parsley flakes", "1/2 tsp. leaf oregano", "1 tsp. leaf basil", "1/2 tsp. salt, divided (salt substitute)", "1/4 tsp. pepper", "2 pkg. (10 oz. each) frozen chopped spinach, thawed and drained well", "2 c. low-fat Ricotta cheese", "1 (8 oz.) pkg. Mozzarella cheese slices"]
["Brown ground beef and onion; drain off fat.", "Stir in the tomato sauce, parsley, oregano, basil, pepper and 1/4 teaspoon salt.", "Simmer, uncovered, for 10 minutes, stirring occasionally."]
["ground beef", "yellow onion", "tomato sauce", "parsley flakes", "leaf oregano", "leaf basil", "salt", "pepper", "spinach", "low-fat Ricotta cheese", "Mozzarella cheese slices"]