Decent Mexican food in Europe:-) (BTW, "if it were available") Edit: if I ever 'made it big', and decided to stay in Italy, I'd invest a portion of my money in a good Mexican restaurant here. It would probably lose money, but what the hell.
Its not Mexican, but the best Peruvian food I've had outside of Lima is in Amsterdam http://www.casaperu.nl/html/casaperu.html can't recommend it enough!
(My wife was born in Lima and we eat alot of Peruvian food)