Turkey Sweet Potato Casserole

Name: Turkey Sweet Potato Casserole
Ingredients: 2 c. cooked, mashed sweet potatoes; 2 tbsp. packed brown sugar; 1½ tsp. ground cinnamon; .13 tsp. ground nutmeg; ⅓ c. evaporated milk; ¼ c. Swanson® Chicken Stock; 1 small onion; 1 can water chestnuts; 1 can Campbell's® Condensed Cream of Chicken Soup (Regular or 98% Fat Free); 3 c. cubed cooked turkey; 3 tbsp. water