Ongijeong serves udon and tendon in a Japanese home-style format near Garosu-gil in Sinsa-dong. The udon broth is light and clean, and the tendon comes topped with several kinds of fried items. On weekend lunchtimes the wait runs 20 to 40 minutes, and you write your name in a waiting notebook. The fried items can cool or go soggy, leaving a strong oily taste.