Michael K.
Yelp
This place is famous to DC locals for its pizza (which is great for sure don't get me wrong), but they are secretly the creators of the best sandwich in the entire city and possibly the east coast. I will tell you now to get the following sandwich:
First thing is first: *****make SURE to order ANY sandwiches from Vace on their homemade focaccia bread; it is heaven.*** Conversely, the hard rolls that they use otherwise are just that; extremely hard, and with no flavor. IF THEY DO NOT HAVE FOCACCIA THE DAY YOU ARE THERE, DO NOT GET A SANDWICH. That is what I call a pizza day. It is very good pizza, so this is not a huge loss, but do NOT eat their sandwich with the hard roll, it is straight up bad bread, and you will think I am wrong about my sandwich assertion.
Ok here is the sandwich: Imported prosciutto (yes they have the domestic prosciutto for cheaper; it is worth it for the upgrade), fresh mozzarella, basil, tomato, onion, lettuce, mayo, *little bit* of oil & vin (you don't want it soggy). If you ordered it right (be sure to specify all of these things), then you will be in possession of my favorite all time sandwich. Let me be clear that I lived in Philly for 8 years and NYC for 2; I have been to some amazing sandwich spots, but this is my very favorite sandwich.
Do you want a vegetarian version of this sandwich? Because it is a strong sandwich even without the prosciutto (and significantly cheaper). If you're doing it meatless I'd probably recommend getting it without the onion.
There are so many reasons this place is special, from the little old nonnas who have been grandmas there since I started going in the 90's to the house cured olives to the tiramisu to the pizza to the homemade pasta you can get in the freezer to the imported pistachios... the list goes on and on. But the sandwich is what makes this place legendary, and above all else.
They also have a location in Bethesda which is pretty much as good.