From Recipes True Italian tuna conserva is a far cry from Chicken of the Sea. Fresh fish is poached in a bath of water or olive oil, and seasoned with a variety of aromatics such as fennel, garlic, lemon, and crushed black peppercorns. Once prepared, it is stored in tightly packed jars of olive oil. Today's Cook the Book recipe, excerpted from A16 Food + Wine, is for Tuna Conserva with Potatoes, Radicchio, Green Olives, and Almonds. If you are so inclined, you can make your own tuna conserva