Young Bean, EC2V 5VS
A Korean restaurant on the Barbican highwalks near to the Guildhall. It was formerly around the corner (as Young Bean, EC2Y 5EL), but moved to its current location in mid 2008.
They do an all you can eat buffet at lunchtime, which is kept warm using bain-marie style dishes built into the central counter top. Billy has noted that this is not always as effective as it could be, and the food sometimes goes a bit cold. However, other than that the selection is good (covering things from sweet and sour chicken to kimchi, with hot and cold dishes) and quality is not bad at all. They also offer the buffet as a takeaway, giving you a fairly generously sized box. As of mid-2009 it's about £9 for eat-in and less for takeaway.
They have an a la carte menu with choices of sushi and more traditional Korean food including bibimbap. This is served at lunchtime and also in the evening.