Shrimp Taco (Chela's Tacos, San Antonio)
Where It's From: Chela's Tacos, often parked at the southwest corner of UTSA Blvd and Roadrunner Way, San Antonio
Why It's a Standout: Chela's fire-engine red truck stirs an intense Pavlovian response in all who spot it, and no item produces a more conditioned response than the taco de camaron. Plump grilled tiger shrimp swim in a spicy cream sauce with green salsa on downy handmade tortillas: an immensely gratifying ode to interior Mexico. The quality of ingredients and attention to detail rivals that of any restaurant – on wheels, or off.