As Ezra Klein says it would be remiss not to give this transparently link-whoring Observer list of The 50 Best Foods in the World and Where to Eat Them the attention it so desperately craves. And like Ezra I've only had two of them: the pastrami-on-rye at Katz's deli in New York and currywurst in Berlin's Prenzlauerberg. Each was good; each easily replicated elsewhere in their respective cities. Or at home, for that matter.
I don't eat fish, so I don't know about the Fish & Chips at the Wee Chippy in Anstruther. My favourite chips, however, are to be had at Leo Burdock's in Dublin. For that matter, I'm sure that the steak at El Carpicho in Spain is pretty good, but for ordinary folk I reckon you'd be hard-pressed to beat the beef you'll find at any one of a couple of dozen places in Buenos Aires.
I also dispute the Observer's assertion that the best pizza is found in New Haven, Connecticut but more importantly - and unaccountably - missing from the list: where can you find the world's best deep-fried pizza?