Yeongdong Naengmyeon in Seoul is a restaurant that serves spicy naengmyeon and goma gimbap. For mul naengmyeon and bibim naengmyeon, the spice level is adjusted to 0, 30, 50, 70, or 100 percent and topped with a generous amount of sesame seeds. Order the mul naengmyeon without sauce together with the goma gimbap dipped in mustard sauce, and add onyuk su as well. The 50 percent spice level is already spicy, so those sensitive to heat should start at 0 percent.