chicken, wild rice and green bean casserole

Ingredients

• 3 cups chicken breast, cooked and cubed
• 1 package uncle ben's wild rice, cooked
• 1 can cream of celery soup
• 1 medium jar sliced pimentos
• 1 small onion, finely chopped
• 2 cups french-sliced green beans
• 1/2 cup sliced water chestnuts
• 1 cup mayonnaise (do not substitute salad dressing)
• salt & pepper to taste
• 1 can french fried onion rings, crumbled for topping (optional)