HEAT oven to 325°F.
BROWN sausage; drain, reserving 1/2 cup drippings. Stir hot water into reserved drippings in large bowl. Add stuffing mix and cooked sausage; stir just until moistened. (Do not stuff turkey until ready to roast.)
STUFF neck and body cavities lightly with stuffing. Truss turkey; place, breast-side up, on rack in large roasting pan sprayed with cooking spray. Spoon any extra stuffing into separate baking dish sprayed lightly with cooking spray; cover.
BAKE 3 to 3-1/4 hours or until internal temperature of thigh is 180°F and breast and center of stuffing are 165°F. Bake any extra stuffing with turkey the last 30 min. of the turkey baking time.