First off: I'm not a vegetarian, nor do I play one on TV, so I'm not naturally attracted to veggie entries.
Damn, their Samosa Chole is good. They offer a decent assortment of add-on chutney, but I thought the flavor balance was spot on right out of the window: a hint of fruit to take the edge off the low, slowly building warmth. Fast, filling, flavorful. And reasonable, which doesn't start with an F, but it's important too for a food truck.
A perfect match for the beers at the annual Brewer's Heritage Festival in Forest Park, especially the hoppier numbers.