1 head lettuce, chopped
1 avocado, cubed
8 oz. Cheddar cheese, grated
1 pkg. nacho cheese Doritos
2-3 tomatoes, chopped
1 lb. hamburg
2 onions, chopped
1 pkg. taco seasoning
1 bottle Thousand Island dressing

Brown hamburg, drain; add taco seasoning to hamburg according to package directions. Mix other ingredients in a large bowl, except Doritos.

Just before serving, add hamburg and slightly crushed Doritos and toss lightly.