Thanks to our Napa hounds for planting this name in my head. I made a quick U-turn when I spotted the truck on upper Soscol today at lunchtime. Got a three taco sampler - lengua, carnitas, and al pastor. All wonderful, with different salsas on each, and very good corn tortillas. The al pastor had the hottest, and it's still burning a hole. The grilled whole green onions were a treat and I liked that the radishes were icy cold. Good horchata too. Ate quickly standing up under the shade of the truck's canopy, using the ledge to hold my drink. All and all, I'm a happy customer for my 5 bucks.