Great little joint on Madison's East Side for South of The Panama Canal eats. For those not very adventurous on their first time, there's always arepas, which are simple sandwiches where the "bread" is a pocket instead of slices. The empanadas are slightly different than most South American varieties as the shell is made from corn meal. The Aji Crillo (green) sauce IMO could use a little more "pop", but the flavor is good.
It's not fancy, but the quality is good. Check it out.