Taco Soup

1 lb lean ground beef
3/4 C. chopped onion
2 cans stewed tomatoes (16 oz), cut up
2 cans kidney beans with liquid (16 oz)
1 (16 oz) can tomato sauce
3 C. water
4 tsp. taco seasoning

Brown ground beef and drain. Sauté the onions and add the remaining ingredients. Simmer 2 hours. Serve with sour cream, grated cheese, chopped onions, and tortilla chips (Cheesy Doritos are our favorite.)