I found this recipe the other day and it was good.
Lg can chicken (drained)
small jar chopped pimiento (drained)
Lg can mushrooms stems & Pieces (drained)
1 can cream of mushroom soup (or whatever “cream of” you like)
1 can milk (use soup can)
1-1/2 c. macaroni noodles (uncooked)
2 c. sharp cheddar cheese
salt and pepper
mix all ingredients together in casserole dish, cover and bake 350* 1 hr.