Taco Soup

1 lb ground beef
1 pkg mild taco seasoning mix
1 (16 oz) can corn
1 (16 oz) can kidney beans, drained and rinsed
1 (16 oz) can pinto beans, drained and rinsed
1 (28 oz) can stewed tomatoes
1 (8 oz) can tomato sauce
1 can chili (with beans or no beans)
grated cheese
sour cream (optional)

Brown ground beef in heavy saucepan; drain. Place in a crock-pot: Taco seasoning, ground beef, corn, chili, kidney beans, pinto beans, stewed tomatoes, and tomato sauce. Simmer 3-4 hours. Serve with tortilla chips, cheese, and sour cream.