First of all, wash and peel the eggplant, cut it into hobnail pieces, peel the potatoes and cut them into thicker slices, and break the peppers into medium-sized pieces that are not too big and not too small. The oil in the pot to boil to 5 six percent heat can be eggplant pieces into the pot for frying. Fry the eggplants for about 5 to 6 minutes, until they are slightly battered. Put in the potato slices, three minutes after the potato slices, the eggplant and potatoes can be removed, and then put in the green pepper pieces. After two minutes or so, remove the peppers and set aside on a plate. In a small bowl put the right amount of salt and sugar soy sauce, soy sauce, oyster sauce, the right amount of water into the sauce, start the pan and pour a little oil, and then fish out the eggplant and potatoes and green pepper pieces into the pan, and then pour the sauce along the edge of the pan into the pan, stirring evenly to collect the juice.