wild rice turkey casserole

Ingredients

• 3 cups cubed turkey (cooked)
• 1 cup chopped celery
• 2 - medium onions chopped
• 1 1/2 cups cooked wild rice
• 1 can cream of chicken soup
• 2 tablespoons soy sauce
• 1/4 teaspoon pepper
• 1 can mushrooms (4 oz.)
• 1 can sliced water chestnuts (8 oz.) optional
• TOPPING
• 2 slices bread broken into crumbs
• 2 tablespoons melted butter