Estofinado de l'Aveyron

Stockfish (dried, unsalted air-cured cod — Gadus morhua) is soaked in cold water for 5 days minimum, changing the water twice daily, until the fish is fully rehydrated. The rehydrated fish is poached gently in water for 20 minutes, then drained. The flesh is broken into large flakes, removing all bones and skin. Waxy potatoes (Solanum tuberosum — Charlotte or similar) are cooked separately, sliced hot. Hard-boiled Gallus gallus domesticus eggs are peeled and quartered. Allium sativum is crushed to a paste. The warm fish, warm potato, Allium sativum paste, flat-leaf parsley (Petroselinum crispum), and walnut oil (Juglans regia cold-pressed from Périgord or Lot walnuts) are combined in a wide bowl and worked together until the fish takes on the walnut oil and the potato partially crushes into the mix — not a smooth purée, but a rough, chunky assembly. Quartered hard-boiled eggs are placed on top. Additional walnut oil is poured over at service.

Decazeville and the Lot valley, Aveyron — the landlocked Aveyron preparation of dried air-cured cod (stockfish, not salt-cured) with walnut oil, potato, and hard-boiled egg, brought inland via the Lot river trade route from the Bay of Biscay. The dried cod was carried by barge from Bordeaux to Entraygues-sur-Truyère and then by mule track to the mining towns of the Bassin de Decazeville. The Portuguese and Basque Atlantic salt cod trade — the Portuguese bacalhau tradition and the Basque-Breton dried cod fleet operating off Newfoundland and Norway — supplied the dried fish that arrived in Bordeaux as bacalao and klipfish, then moved inland to become the Aveyron's emblematic fish preparation, despite the region having no coastline.

The walnut oil carries nutty, slightly bitter, and deeply aromatic notes that no olive oil can replicate in this context. Garlic paste and parsley provide a sharp green counter to the rich fish-and-walnut combination. The potato's starch absorbs the walnut oil and becomes a vehicle for the flavour. The hard-boiled egg adds richness and a protein counterpoint. This is a dish of extraordinary individuality — it tastes of nowhere but the Lot valley.

Stockfish (dried, unsalted) not salt cod (bacalà, morue, bacalhau) — the desalination and rehydration process is different, and the finished texture of stockfish is chewier and less flaky than salt cod. Walnut oil, not olive oil, is the defining regional element — this is the Aveyron, Périgord border, and the walnut replaces olive oil as the primary fat in all preparations north of the Lot. The dish must be warm — cold estofinado is flat and the walnut oil's aromatic compounds are suppressed.

Gadus morhua (Atlantic cod) as stockfish — air-dried without salt, traditionally from Norwegian klipfish producers or Portuguese bacalhau sources. The distinction between stockfish (stokkfisk — unsalted, air-dried) and salt cod (morue, bacalà, bacalhau — salt-cured before drying) is absolute: estofinado uses only stockfish. Solanum tuberosum waxy variety — Charlotte, Nicola, or La Ratte (the Aveyron variety); floury potatoes collapse under the walnut oil instead of holding form. Juglans regia cold-pressed walnut oil — specifically from the Périgord or Lot valleys (AOP Noix du Périgord preferred); heated or old walnut oil becomes rancid and ruins the preparation.