1 1/2 lbs. ground beef
1 pkg. taco seasoning
1/2 c. water
1 can crescent rolls
1 1/2 c. Doritos chips, crushed
1 c. sour cream (or cottage cheese)
6 slices American cheese

Preheat oven to 375 degrees. Grease a casserole dish. Brown and drain ground beef. Add taco seasoning and water. Simmer 5 minutes. Line a casserole dish with unrolled crescent rolls. Sprinkle part of chips on top of rolls. Spoon on meat. Spread sour cream. Add cheese slices and top with remaining chips. Bake 20 to 25 minutes. Serve with lettuce and tomatoes.