1 lb. Nacho Cheese Doritos
1 pkg. Taco Seasoning Mix
2 lbs. ground beef
1 pkg. shredded Cheddar
1/2 head lettuce
1 lg. bottle Catalina Dressing
2 diced tomatoes

Brown beef according to directions on seasoning mix. Drain grease. Crush Doritos in bag. Mix all ingredients, except Catalina. Add Catalina before serving.