Some of Houston’s best grub can be found in parking lots and vacant lots, dished out of Airstreams and food trucks by both amateur and professional chefs. About 1,000-plus food trucks cruise Houston streets. But Tacos Tierra Caliente in lower Montrose is legendary. Former Hugo’s cook Nana Samano’s tacos pack optimal flavors. For less than two bucks, you can buy a diminutive corn tortilla stuffed with roasted pork and sweet, tangy chunks of pineapples, or try the robust barbacoa blanketed with fresh onions and cilantro. Spritz on fresh lime and savor the true flavors of Mexico.