1 (7 oz.) pkg. macaroni, not cooked
2 c. milk
1 can cream of celery soup
1 can cream of mushroom soup
1 (2 oz.) can mushrooms
1/4 or 1/2 lb. processed American cheese, grated or cut up
3 c. cooked chicken or turkey, diced
Salt and pepper
1 sm. onion, chopped and cooked
Pimento (if desired)

Mix all in large bowl. Cover and let stand in refrigerator overnight. Remove 1 hour before baking. Stir well. Divide into 2 (1 1/2 quart) casseroles. Bake at 350 degrees for 1 hour.