Ox Live Fire Grill Seongsu is a dining restaurant in Seongsu that serves Hanwoo steak and barbecue. The Hanwoo steak is cooked to a proper doneness and is rich in juices, and it can be enjoyed as a course at lunch. The lunch course comes in the order of onion soup, beef tartare, pasta, steak, and dessert. Portion sizes vary depending on the menu.