Seonji-haejangguk (Ox Blood Hangover Soup)

People hear ox blood and expect the soup to be severe. Good seonji-haejangguk is not severe. The seonji (coagulated ox blood) is already set into a soft curd, sliced thick, and it should sit in the broth like tender tofu with an iron shadow. Boil it hard and you punish it. Slip it in late and let it warm through gently; that is the whole lesson.

Master Seong-nyeo took me to a market soup house before sunrise once, after the vendors had started carrying crates and the last drinking tables were still pretending the night was young. She ordered this, not because she liked drama, but because she liked a soup that used what the butcher had, what the cabbage seller trimmed away, and what a tired body could actually keep down. This is Seoul food in its work clothes.

Tonight it asks for time, not cleverness. Blanch the bones so the broth is clean, season the ugeoji (outer cabbage leaves) before it enters the pot, and measure the finished broth at 8 cups so the salt has a place to stand. The seonji goes in last, at a bare tremble. This is how a market bowl becomes a home recipe someone can cook twice.