Since it is winter, which obviously is a perfect time for wandering around the city, I am looking for great cheap food adventures in the five boroughs. Beyond the obvious like Flushing, Chinatown, and the East Village, are there neighborhoods that I might not know about that are wonderful just to go to, wander around, and try different kind of food/particularly delicious foods. It is mostly important that it is accessible by subway and extremely cheap, since I am looking for ways to spend Saturday and Sunday afternoons that don't kill my miniscule budget. Thanks!