Ah, Kleftiko (aka Bandit Lamb). My all time favourite dish and The Broken Plate does an excellent (if slightly overpriced) version. I do wish the sides were a little more substantial for what you pay for the dish as a whole, but when you start pulling that ridicuously tender braised lamb shank off the bone you can forgive their shortcomings.
Oh, and if you are there around 9 I think it is, you get the joy of greek music, dancing and plate smashing - OPA!!
A few ouzo shots and you can complete your fairly pricy meal with some wonderfully decadent baklava! Go on, splurge a little.