I'm probably very wrong (typical), but I think Harvest Moon Grille is one of the originators. They helped start the "gourmet" food truck revolution here in the QC and they're still doing it as well as they were on day one.
With a changing menu, a staple is still the carnitas tacos. Pair that up with a beer bottle of Root Beer and you can get one up Mecklenburg PD - if they attempt to harass you for walking around with an open container of alcohol.
Okay, fine, I cant lie, was a little scared walking with that bottle though.