ARISCOS GERMAN BEYER anchors the back end of the narrow parking lot next to San Ysidro Liquor just off Beyer Boulevard, about 20 minutes from downtown San Diego. The white and blue food truck trades heavily in savory fish tacos, lime-soused aguachiles, and colorful ceviches. A lunch crowd gathers around the service window—near the drinks, sauce bottles, and napkins—waiting for owner Jorge Fuentes to call their order numbers. Food in hand, many diners sit at the shaded tables beneath the nearby tent, while others retreat to the comfort of their cars. As the lunch rush fades, Fuentes eases off the
