Add the marinated pork pieces and fry for 6-7 minutes, turning once, until golden-brown on all sides. Reduce the heat to low, cover the pan with a lid and cook for 35-40 minutes, stirring occasionally, or until the pork is tender. Add small splashes of boiling water to the pan as necessary if the juices in the pan dry out. Add as little water as possible as the resulting sauce should be quite thick.