Haven't seen this reported yet. I apologize if this is common knowledge, but on the way back from my run to fresh pond, I noticed the silk road BBQ truck on Concord Ave, across from clay pit pond, in a parking lot on the south side of the street. They were packing up at 8:30, so I didn't get to re-sample their wares, but they said they will be there 5-8:30, Tuesday-Friday. Still at the greenway for lunches, and it appears from the website that they go to the Waltham Farmers Market on Saturday.
FYI, this is just down the road from Golden Garden. Apparently, someone is thinking about opening a sushi place right next door to GG. This area of concord ave is quickly becoming the most chowish area of belmont (not that there is a lot of competition)
Silk Road BBQ
Rowes Wharf Plaza, Boston, MA 02110
63 Concord Ave, Belmont, MA 02478