Well - I've been addicted to this place for a couple of weeks now and I figure I'd have to post on it, especially since a week after I found it the Voice went and put it on their cover! (I wasn't trying to hide it - just been a bit lazy as of late.)
It's a shack located at the corner of 46th Street and 5th Avenue in Sunset Park - on the southeast side of the street. You'll need to break out your high-school Spanish, and there's only enough room for two people to eat at the small counter (don't fret - there's a park three blocks north on 5th Ave.). However - what comes out of those Igloo coolers is nothing short of perfection.
The chicken mole tamales are fantastic - exactly how a mole sauce should be. Pretty hefty, perfectly steamed in a corn husk, and only $1. There's two more chicken tamales - green and red - which are both tasty and quite spicy. The cheese tamales are also very good, and have become my second favorite. My spanish is too poor to understand what the other ones are, but if anyone can and would be kind enough to report back...
Also available is arroz con leche and a few drinks (lemonade, a sangria-like fruit drink, and a milky white one - orchata?).
You could put a full meal together in the direct vicinity as well - a block south on 5th Ave., between 46th and 47th, is a woman who sells corn on the cob slathered in mayonnaise, then coated with cheese and chili powder ($2). Two blocks further south and you'll find a woman (possibly only on weekends) selling flowering mangoes ($2).
I keep meaning to try other places in the neighborhood out, but I can't make it past 46th St.