This dish is a regular served on the beaches of Mexico. Serve it as a seafood appetizer or as a side salad dish. You can alter it to suit your own taste. Make it as spicy or as mild as you wish. My friends all love it. I often use shrimp & fish or shrimp & scallops - when I do this I do not marinate the shrimp as the shrimp tend to get tough. I steam the shrimp and add them a few hours before serving as I mix all the ingredients together. In Mexico when they make this they often add sea water (not recommened). If you are using frozen fish, choose a firm-fleshed fish and make sure it is fully thawed with as much moisture as possible removed.