1 lg. head lettuce
1 lg. onion
1 can kidney beans
1 1/2 lbs. ground beef (browned)
12 oz. Cheddar cheese
1 (16 oz.) pkg. Doritos, crushed
1 pkg. taco seasoning mix
1 pkg. Hidden Valley Ranch salad dressing
1 c. mayonnaise
1 c. buttermilk
3 tomatoes

Mix ranch dressing as directed and chill. Fry ground beef with taco seasoning; cool. Mix salad in large bowl except chips. Mix in cool ground beef and add Doritos just before serving.