Scallop Ceviche with "Tiger's Milk"

In a country known for its fascinating, wide-ranging cuisine, ceviche just may be Peru's national dish. Combinations of sparklingly fresh raw fish marinated in a piquant dressing (often made with ají amarillo and lime juice) are served everywhere, from the lowliest fish shacks to the finest restaurants. For food-safety reasons, we choose to gently poach the scallops, but otherwise, this version, accented by tender sweet-potato cubes, chewy kernels of choclo (a type of Andean corn), and red bell pepper, is entirely classic. Don't forget to drink up the delicious liquid that remains after the ceviche has been eaten. Peruvians prize this leche de tigre as a hangover cure.