San Diego is brimming with amazingly authentic Mexican food. From the layers of fish and shrimp ceviche on the Tostada Loca at Mariscos German Beyer, to traditional lamb head barbecue at Aqui Es Texcoco, Pork Carnitas Tacos at Carnitas Snack Shack, and Smoked Fish Tacos at Oscar's Mexican Seafood, Chef Aarón Sánchez has his work cut out for him as he eats his way through this world-class culinary destination.