2 lb. ground beef
1 finely chopped medium onion
2 (14 1/2 oz) cans diced tomatoes
15 oz. tomato sauce
1 c. water
15 oz. can pinto beans, rinsed and drained
14-16 oz. can whole kernel corn, drained
1 taco seasoning mix

Brown beef and onion, drain. Add remaining ingredients. Bring to a boil. Reduce heat and simmer for 15-20 minutes. Top with grated cheddar cheese and serve with corn chips.