I posted about the Argentinian ladies who serve empanadas and a spinach pie. The empanadas were the first really fine empanada I've ever had in the DC area. Baked with a dry filling of minced pork, egg, and onion. Very simple and very delicious. A bargain at only 2 bucks each. The spinach pie was no bargain at 7 bucks, but was very good and came with a side salad.
You won't know who's serving what until you get up to the stand and ask them what they have (with one exception - there's one stand that sells empanadas and they are clearly marked). We tried 5 out of 7 stands that were there but not everything that was offered at each stand. We liked the tacos the most but we liked pretty much everything we tried.