Jeonggwan Maeun Sujebi is a kalguksu shop in Jeonggwan New Town, Busan, serving spicy knife-cut noodles made with sancho and bangah. It also serves perilla seed kalguksu and mandu, and cooking begins after an order is placed. Calling 15 to 30 minutes ahead reduces cooking time. Walking in without calling means waiting about 30 minutes for the food to come out.