Choose from easy tuna appetizers, tuna entrees, tuna salads and tuna sandwiches. Cook some slices of tuna in a broth made with bay leaves, onion, garlic and one cup of vinegar. Tuna Recipes with canned tuna from Genova® Tonno. Store in a cool, dry place for up to one month. Seal the jars hermetically to ensure that no air bubbles form. Once the slices are cooked, place them in sterilized jars and cover them with good quality extra-virgin olive oil.