Gogi-guksu

Gogi-guksu is a 20th-century Jeju dish, and its exact chronology is unrecorded. Wheat noodles were not widely eaten on Jeju before the 1910–1945 colonial period; the American wheat-flour aid that ran into the 1960s and the South Korean government's mixed-grain (honbunsik) campaign through the mid-1970s made dried wheat noodles common on the island. The dish became fixed in local custom after the 1973 Family Ritual Code (Garye-junchik), which urged serving noodles instead of rice at weddings and funerals: Jeju households already slaughtered a pig for such events and served its meat and broth, so cooks ladled the pork broth over boiled noodles. According to the Encyclopedia of Korean Culture, on Jeju the word for 'meat' by default means pork, not beef. The dish gained nationwide fame from the late 1990s, with demand rising during the 1997 Asian financial crisis, after which more noodle shops opened on Jeju City's noodle street.

The broth is opaque and milky, savory and faintly sweet from long-rendered pork, with a clean finish rather than a greasy one. Noodles are medium-thick and slippery, with a soft chew that holds. The boiled pork belly is tender and gently fatty, sliced thin so it warms through in the hot broth. Scallion and sesame lift it; a stir of dadaegi paste and gochugaru turns the bowl warm and red. Served piping hot. If the broth tastes thin and grey rather than white and round, the bones were not simmered long enough.

The milky broth is an emulsion: a hard, rolling boil of pork bones (rather than a bare simmer) breaks rendered fat into tiny droplets and drives collagen from the bone and skin into gelatin, which keeps the fat suspended and gives the soup its white color and body — the same physics as seolleongtang and Japanese tonkotsu. Boiling the meat first builds the savory base; continuing on the bones for hours extracts the gelatin. Blanching the bones and skimming the scum first keeps the broth clean rather than muddy. The pork belly is removed once just tender and rested before slicing, so the slices stay intact instead of shredding.