Somunnan Mandu is a dumpling shop in Seoul that sells mandu, steamed buns, twisted fried dough, and red bean donuts. It also serves meat mandu, odeng, and sundae, and the broth is not salty. Arriving early means receiving steamed buns warm from the steamer as soon as they are ordered, with a strong red bean filling. Koroke comes in limited quantities and may not be available at the time you want it.