For this fish recipe you need Tilapia Fillet of Sushi quality. The fish must be extremely fresh, because it will not be cooked, just marinated with lemon and then in a lukewarm vinaigrette type sauce. BUT if you can get Tilapia of sushi quality this dish is a fantastic appetizer or a very light summerly fish dish. Serve it it with a green salad or cherry tomatoes and with a fruity white wine like Pinot Grigio. Something different. I love it.