2 to 3 lb. hamburg
1 or 2 heads lettuce
1 lg. or 2 regular bags Doritos
3 or 4 tomatoes
2 regular bottles Catalina dressing (Kraft)
2 (12 oz.) bags shredded Mozzarella cheese

Cook and crumble hamburg. Drain thoroughly and set aside. In large bowl, cut lettuce and tomatoes into small pieces. Mix in cheese. Crush Doritos into small pieces in bag. Just before serving, add hamburg and Doritos. Add dressing last.