If you happen to be wandering the streets of Seoul and spot billows of steam rising from stacked metal cooking vessels, you can be all but certain something magical is happening inside. Such is the case at Bukchon Mandu, a franchise of hole-in-the-wall dumpling joints located throughout the city. Grab a seat in the cramped spaces of one of the locations of this favored fast-food eatery and don't waste a minute placing your order, as the rushed servers demand quick decisions. Fortunately, any choice from the menu is a solid one; to sample a variety of the restaurant's famous dumplings, go for the Modeum Mandu sampler. The set comes with a portion of large (croissant-size!) fried dumplings stuffed with vermicelli noodles, vegetables, and pork; soft steamed dumplings packed with pork or kimchi; and flourless pork and veggie balls. Use the soy sauce and vinegar at the table to concoct a killer dipping sauce. The mandu are monstrous and overly filling, but they still pair well with a bowl of Bukchon Mandu's mul naengmyeon, North Korean-style cold noodles. The tangy, icy broth and chewy buckwheat noodles are addictive and might have you considering ordering an extra bowl. That is, if you still have room for it.