Ceviche is a light and refreshing, chilled citrus-marinated seafood salad which originated in Peru. The acidity of the marinade denatures the protein structure of the fish, essentially "cooking" it. The result is a less fishy-tasting dish than other uncooked seafood. Note: Other types of fresh seafood (such as lobster, shrimp, scallops, octopus, etc) may be substituted for the fish, if desired. Always purchase the freshest seafood you can find, preferably sushi-grade.