cream of chicken casserole

Another family friend recipe that uses "traditional" ingredients that I'd like to redux sometime into something fresher.

• 3 c cooked chicken
• 3 c cooked and chopped celery
• 3 c cooked rice
• 1 - 2 cans cream of chicken soup
• 1 small package slivered almonds
• 1 1/2 c cornflakes crumbles
• 1 stick melted butter
• 1 can water chestnuts, drained and sliced

1. Preheat oven to 325.
   
2. Combine first 4 ingredients and pour into greased 9x12 baking dish.
3. Mix almonds, cornflakes and butter, and coat the top of the chicken mixture.
4. Layer chestnuts on top.
5. Bake for 25 minutes.