Food truck mania has exploded in the last couple of months with Mexicue, Korilla, La Cense, Schnitzel Truck, etc. grabbing the spotlight. I still recall a tasty bratwurst from the Hallo Berlin cart a few years ago.
These days I work down by FiDi and there are a couple of decent, no more than that, Halal chicken & lamb carts. They do ok in a pinch.
I do have a Baoguette a couple of blocks west of my building, so THAT'S a lucky break.