Ceviche is a popular Latin American dish that involves marinating chopped raw fish in fresh citrus juice, fresh herbs, and various other spices and aromatics. After a few hours of marinating, the acid in this mixture "cooks" the fish in a sense. That said, using the freshest seafood you can find is a must for ceviche. This Ceviche Verde, or "green ceviche," stars meaty, rich halibut and is brightened lime juice, lemon juice, fresh cilantro, and crispy tart tomatillos. Ripe avocado contributes an element of richness, while jicama delivers a refreshing crunch. Jicama is an edible root that resembles a turnip. You can find it year-round in the produce section of many supermarkets and Latin American markets.