1 med. head lettuce
1 lb. hamburger prepared with 1 pkg. taco seasoning as directed
1 chopped onion
1 chopped tomato
1 (8 oz.) pkg. shredded cheese

SAUCE:

1 c. mayonnaise
1 tbsp. taco seasoning
1 tbsp. sugar
1 pkg. Doritos, crushed

Layer in a bowl in order as above. Make sure hamburger is cooled before layering. Add the sauce and chips just before serving and mix well.