The icy Humboldt Current that flows through the Pacific Ocean just off Peru’s coast supports one of the world’s most bountiful sources of seafood. If Peru had an official national dish, it would probably be this preparation of raw fish marinated in citrus juice. The acid in the fruit “cooks” the fish, giving it a delicate flavor and slightly chewy consistency. The dish is usually spiced with red onion and aji pepper, and served (typically at lunch) with sweet potato or choclo, a white Andean corn with dime-size kernels. Bold gastronomes can drink the leftover citrus marinade, which is known as leche de tigre, tiger’s milk.