I ate una-don for the first time on Saturday, in the Toku restaurant in London (next to Japan Centre)... it was very good indeed!
Sorry Columbine, I was thinking of going to that Okonomiyaki restaurant you mentioned, but I'm saving that meal for my next trip to London in October... not long to wait!
Oh, while I'm on the subject of food... wasabi peas! Wow... I'll say no more for now
