1 chicken, boned
1 onion, chopped
1 c. chicken broth
1 can mushroom soup
1 can cream of chicken
1 pkg. Doritos
1 c. cheddar cheese
1 can Rotel tomatoes and green chilies

Mix liquids in saucepan and heat to blend. Butter casserole pan. Layer chicken, chopped onion, cheese grated and Doritos. Pour liquids over other ingredients and top with cheese. Bake at 350 degrees for 45 minutes or 1 hour with lid.