Happy Banh Mi is a Vietnamese restaurant inside Changsin Market in Jongno-gu, Seoul. It sells only three items: banh mi sandwiches, bun cha, and sticky rice, and the banh mi is coated with a special sauce. The sandwiches are pressed in a sandwich maker, so the bread is warm and crisp, and staff ask whether to leave out cilantro when you order. It serves local ingredients and drinks, and many Vietnamese locals visit as well.