Cook hamburger and drain well. Add taco seasoning (reserve 1T for dressing) and blend well. Shred lettuce and add chopped tomatoes, green onion and beans if desired. When ready to serve, add cheese, crushed Doritos and dressing. Mix well and serve immediately. * sour cream and taco sauce are nice additions if desired. Dressing: Blend Thousand Island dressing, sugar, reserved taco seasoning and picante. Mix well and add to salad just before serving.