El Ronqueo's onion tuna is a traditional dish from Barbate, Cádiz, known for its juiciness and freshness. This delicious product is made using high-quality tuna, olive oil, onion, vinegar, spices, and salt, creating an irresistible flavor combination. This preserve not only respects the Andalusian tradition, but also benefits from El Ronqueo's experience, a company dedicated since 2002 to crafting fish preserves and semi-preserves. Enjoy its rich and authentic recipe at any time of the day. It is recommended to store in a cool, dry place away from direct sunlight.