Callipo Riserva Oro - Tuna steaks with olive oil (glass g. 80x2) To produce tuna fillets with Riserva Oro olive oil, Callipo has been choosing the highest quality tuna for over 100 years and processing it completely in Italy (in the Maierato plant) in all its phases, following a centuries-old tradition. After steaming the tuna, the best fillets are chosen one by one, which are still potted by hand, following strict hygiene and food safety regulations. This is followed by a long seasoning, which guarantees that intense and inimitable flavor. The cleaning and qualitative selection of tuna steaks have always been entrusted to the delicate and expert dexterity of the women of the Callipo company. It is they who, following the rules handed down by the ancient tuna tradition, constitute the fundamental pillars of artisanal production. Callipo tuna fillets in glass jars are potted by hand, using only the best slices.