We're planning an Italian restaurant hop and want to hit a few different regional cuisines in one day. I know there are something like 22 different regional cuisines in Italy, but to simplify things, we're thinking about doing the Northern, Central and Southern cuisines. Does anyone have recommendations for restaurants that offer specific regional Italian fare (or certain menu items that deliver that)? We're willing and able to go to any nabe in any borough. Have metrocard, will eat.