Sandong Mandu Gonggalppang is a dumpling shop inside Sinpo International Market in Incheon. It bakes gonggalppang in a wood-fired oven and also sells jjinppang, kimchi mandu, and gogi mandu. The gonggalppang comes out at 1 p.m. and must cool for 7 minutes, and a long line can mean a 40-minute wait to buy. The mandu cannot be eaten right away and must be grilled in oil or steamed.