I'm always a little uncomfortable calling a place without any tables to speak of a "restaurant", but that's not the point, here. I got lunch from the Uptowner, the new sandwich place just north of Columbia Heights Metro. I got a club wrap and a bag of BBQ soy chips. It was kind of expensive - about $9 - but the food was good. They have some vegetarian options, which is rare, and the guy behind the counter was quite pleasant.
The layout is a little funny - you order in one room, and go next door to pick it up. I didn't immediately see next door, and was worried that the sandwiches were going to be pre-wrapped and shipped from somewhere, but they're made fresh next door.
Anyway, I'll go back at some point. I apologize to Julia's Empanadas, where I planned to go, but the construction makes it very difficult to actually get to Julia's. Maybe next time.