Sorry you didn't get an answer. Most peole posting to this board are in the U.S. and we don't have that restaurant. Also restaurants generally don't give out there proprietary recipes that made them famous. However there are lots of copycat recipes out on the internet if you do a search. Here is one from Jamie Olivers's discussion board:
http://www.jamieoliver.com/forum/viewtopic.php?id=30603