Boulet à la liégeoise is a very popular dish served all over Belgium. This dish consists of one or two big meatballs made from pork and veal or pork and beef minced meat, bread crumbs, onions and parsley. Meatballs is served with sweet and sour sauce and fries. Sauce is made from onions, vinegar, brown sugar, Liège syrup and Corinthian raisins.