 According to tradition, it is served with lentils on New Year's Eve, because lentils—due to their shape—are 'credited' to bring money for the coming year.It is prepared by filling the natural casing with rind, pork meat (usually of secondary choice), and fat mixed with salt and spices; in industrial production, nitrites and nitrates are added as preservatives.Some similar sausages exist in the Italian cooking tradition, for example musetto and zampone which are made with different meat and parts of the pork, musetto is made with meat taken from the pork's muzzle and zampone is held together by the pork's anterior leg skin.