Drain peaches and reserve syrup. Combine sausage, onion, bread crumbs, salt, pepper and egg. Mix well and form into 8 balls. Place peach halves, cut side up, in baking dish. Stick 3 cloves in each peach, around the edge. Place the sausage balls in peach cavity. Bake in preheated 350-degree oven for 45 minutes. Drain off fat. Heat the syrup reserved from the peaches and pour over the sausage and peach halves; serve immediately.