1 lb. hamburger
1/2 onion
1 (16 oz.) can chili without beans
1 lg. can stewed tomatoes
2 (10 oz.) cans pinto beans
1 (10 oz.) can Rotel tomatoes
1 pt. sour cream
1 lb. Velveeta cheese

Brown hamburger and onion. Add rest of ingredients. Simmer in crockpot. Serve over Fritos.