Remove giblets and neck from turkey; discard. Rinse turkey with cold water; pat dry.
Loosen skin from turkey breast without totally detaching skin. Stir
together 2 tablespoons butter, salt, and pepper. Rub butter mixture
evenly over turkey breast under skin. Carefully place sage leaves and
thyme sprigs evenly on each side of breast under skin. Replace skin.
Place pear halves, celery ribs, onion halves, and garlic cloves
inside cavity. Place turkey, breast side up, on a lightly greased wire
rack in an aluminum foil-lined shallow roasting pan. Rub entire turkey
evenly with remaining 2 tablespoons butter.
Bake at 325° for 2 hours and 45 minutes to 3 hours and 30 minutes or
until a meat thermometer inserted into thigh registers 180°, basting
turkey every 30 minutes with pan drippings. (Prevent overcooking turkey
by checking for doneness after 2 hours.) Remove turkey from roasting
pan, and let stand 20 minutes before slicing. Garnish, if desired.
*1 (14-pound) whole fresh turkey may be substituted.