2 heads lettuce, broken into pieces
1 green pepper, diced
1 sm. onion, diced
1 lb. Cheddar cheese, grated
1 1/2 lb. ground beef, browned & mixed with 1 pkg. taco seasoning mix, cool
2-3 tomatoes, chopped
1 lg. bag Doritos, crushed
1 lg. bottle Catalina dressing

Mix all ingredients together in a large salad bowl. Chill until ready to serve.