Peruvian-Style Flounder Ceviche is a refreshing and tangy seafood dish that is popular in Peru. The flounder is marinated in a mixture of lime juice, onions, cilantro, and chili peppers, which gives it a bright and zesty flavor. The acidity of the lime juice 'cooks' the fish, resulting in a tender and flavorful ceviche. This dish is perfect as an appetizer or a light lunch.