The essential ingredients needed for ceviche are fresh, high-quality white fish or seafood, combined with intensely acidic citrus juice, finely diced aromatics like red onion, and a careful balance of chilies.
Selecting Prime Fish
The foundation of any great ceviche is the quality of the protein; do not skimp here. You are looking for firm-fleshed fish, such as corvina or sea bass, that have been flash-frozen and handled minimally. The freshness dictates everything—the flavor should be clean, sweet, and slightly oceanic, without any hint of ‘fishy’ funk, which signals poor handling or age. When shopping in the United States, always inquire specifically about the sourcing and freezing process of the fish. Because ceviche is consumed raw, food safety must take absolute precedence.
Regarding safety, it is critically important to follow proper commercial handling guidelines. For instance, if you are acquiring a cut of fish that has been frozen for transport, understand that specific protocols exist to ensure parasite destruction. You must be certain the fish was frozen at -4 °F (-20 °C) or below for at least 7 days (168 hours), or if it was proces