Altered ingredient amounts.
Very nice. But even without having read the other comments, I reduced boiling time on the squid to 2 minutes, sauteed for maybe a minute. That was plenty. Squid came out with that nice snap to the bite that means it's done just so. White vermouth worked fine in place of white wine. Used some "potato onions" I'd picked up at the farmer's market earlier today. And sweet and sour sauce? Not in Greek food, thanks.