2 lbs. hamburger
1/2 c. chopped onion
1 c. instant rice
1 egg
1/4 tsp. salt
16 oz. can tomato sauce
1 pkg. taco seasoning

Mix together first 5 ingredients and shape into balls; place in a baking dish. Mix together tomato sauce and taco seasoning; pour over meatballs. Bake for 45 minutes at 350 degrees. Remove from oven, top with one can of cheddar cheese soup (undiluted). Bake 15 minutes longer.