Bacalhau à Gomes de Sá

This dish belongs to Porto. To the granite city on the Douro where merchants once made fortunes trading bacalhau from Newfoundland. José Luís Gomes de Sá was one of them, and somewhere in the 1800s, he created this layered casserole that would outlive his business, his name, his century.

I learned to make Gomes de Sá from a grandmother in Matosinhos, just outside Porto. Her name was Dona Fernanda, and she'd been making this dish every week for sixty years. She watched me layer the potatoes and shook her head. 'Mais grosso,' she said. Thicker. The potatoes need to hold their shape. She watched me flake the cod and nodded slowly. 'Assim mesmo.' Just like that. The pieces should be generous, not shredded.

This is comfort food in its purest form. Nothing complicated. Nothing fussy. Just humble ingredients arranged with intention and bathed in good azeite until they become something greater than their parts. The eggs and olives go on at the end, a crown of black and white that makes the dish beautiful without trying.

At Mesa da Avó, I serve this family-style, the baking dish set right on the table. People lean in with bread to catch the oil pooling at the edges. That's the moment I love most: when strangers become family over a dish from Porto.