preheat oven to 350.
mix 2c shredded chicken, 2c shredded cheese, can of cream of chicken, 1/2c milk, 1/2c sour cream, can of drained rotel, & 1/2 pack taco seasoning.
Grease casserole dish.
Crush 1/2 bag Doritos and place in bottom, top with mixture, crush a few Doritos on top.
Bake for 30 minutes.
Garnish with lettuce and tomato.