Citrus cooking class with Charlie Palmer. Citrus cooking is a centuries old Latin method of cooking by soaking seafood in the acidic juice of citrus fruits instead of heat. How long you soak the fish depends on how you like your fish “cooked”. Ceviche is Peru’s national dish but what items you add to your Ceviche will determine its flair. In another part of the world, Sweden cures fish with a mixture of Kosher salt and sugar, commonly found on a bagel with cream cheese. $75 per person, limit to 40 participants.