1 head lettuce
2 or 3 tomatoes
8 oz. bag shredded Mozzarella cheese
8 oz. bag shredded Cheddar cheese
1 lb. hamburger
1 (16 oz.) bottle Catalina dressing
1 (13 oz.) bag Doritos

Cut up lettuce and tomatoes. Cook hamburger and drain. Let it cool, then add to lettuce and cheese. Just before serving, add Catalina dressing and crushed Doritos, then eat it.