I've stumbled across several online references recently to a food truck operation in Huntsville called "Vietnamese Sub." Apparently, it's operated out of a kitchen trailer near the Chevron gas station across US72 from Madison Square Mall. Their "thing" is bahn mi Vietnamese sandwiches and I've heard they are in the process of adding additional Vietnamese specialities to the menu. Does anyone have any first hand knowledge of this operation? Any menu suggestions? Are they at the same location everyday? Thanks!