Ceviche is the national dish of Peru consisting of slices of raw fish or shellfish that is spiced with salt, onions, and chili peppers, then marinated in lime juice. Due to the acidity of lime juice, the texture of the fish changes, as does its color – from pink to white.
The acidic marinade, also known as leche de tigre (lit. tiger's milk) "cooks" the meat without any heat involved in the process. For ceviche, fresh fish is an imperative, as fish and shellfish that are not fresh can cause food poisoning.
The flavors of ceviche are slightly acidic and spicy, with an intense aroma of the sea. Traditionally, it is served on a bed of lettuce with tiny pieces of corn, chunks of sweet potato, and boiled yuca. Cancha, a variety of popcorn made from large corn kernels toasted in salt and oil provides an ideal side dish.