Tuna-Cashew Casserole

1 (3 ounce) can chow mein noodles
1 can cream of mushroom soup
1/4 cup water
1 can tuna, drained
1/4 pound cashew nuts
1 cup chopped celery

Mix all ingredients except 1/2 cup chow mein noodles. Put into a casserole. Sprinkle reserved chow mein noodles on top. Bake uncovered at 350 degrees F for 40 to 60 minutes.