Calamares encebollados is a traditional dish that's often served as a tapa. The dish is made with a combination of squid, onions, garlic, olive oil, bay leaves, parsley, white wine, and salt. The garlic, sliced onions, and bay leaves are slowly cooked in olive oil until the onions become caramelized and tender.

The squid is cut into pieces, sautéed in olive oil, then mixed with the garlic and onions. White wine is poured into the pan and the dish is shortly cooked until the alcohol evaporates. Before serving, calamares encebollados are typically sprinkled with chopped parsley.