In Myeongdong, head to Daiso Myeongdong Main Store (43 Myeongdong-gil) or Myeongdong Station Store (134-1 Toegye-ro), both open 10am–10pm. For Korean BBQ you'll want ssamjang: Chungjungone's seasoned ssamjang 190g is ₩2,000 with 280+ reviews. Popular food items vary by store, so try the other one if it's sold out. Ssamjang also works mixed into rice or as a dip for cucumber.
Daiso Mall
Daiso MallDaiso Mall