Ceviche is a popular dish in Latin America that is made by marinating raw fish in citrus juice. This recipe uses halibut, which is a firm and meaty fish that holds up well to the acid in the citrus. The fish is marinated in lime juice, then mixed with diced tomatoes, onions, cilantro, and jalapeno peppers. The result is a refreshing and flavorful dish that is perfect for a summer day.