Brown hamburger and drain off fat. Add taco seasoning (remember to reserve 1 tablespoon for dressing). Let meat cool. Layer lettuce, hamburger, cheese, beans, onion and tomatoes in a large container.

Put cheese on top and refrigerate 24 hours.

Dressing: Mix Thousand Island dressing, sugar, taco seasoning and taco sauce. Refrigerate until serving time.

Just before serving: Crush chips (not too small). Add chips and dressing to layered salad and toss.

Note: Smaller portions of layered salad, chips and dressing may be tossed at each meal so that chips don't get soft and lettuce stays crisper.