Turbot Rôti — Roasted Turbot on the Bone

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Roasted turbot on the bone is arguably the grandest fish dish in the French classical repertoire — a whole turbot or thick tronçon, seared in a blazing-hot pan and finished in the oven until the flesh pulls cleanly from the cartilaginous skeleton while remaining pearlescent and succulent at the centre. Turbot (Scophthalmus maximus) is the king of flatfish: its firm, dense flesh has an almost meat-like quality and a clean, briny sweetness that requires only heat and butter to achieve perfection. The technique: bring the turbot tronçon (3-4cm thick, 250-300g per portion) to room temperature. Season aggressively with fine salt 20 minutes before cooking — the salt draws moisture to the surface, which must be patted dry for the Maillard reaction to occur. Heat a heavy-based ovenproof pan (cast iron or thick steel) until smoking, add a thin film of grapeseed oil, and place the tronçon presentation-side down. Do not touch for 3-4 minutes — the fish must develop a deep golden crust at 170-180°C surface temperature. Add 40g butter, 2 crushed garlic cloves, and a sprig of thyme to the pan, tilt, and baste the fish continuously for 60 seconds as the butter foams and turns golden. Transfer to a 200°C oven for 8-12 minutes depending on thickness, basting every 3 minutes. The turbot is done when the flesh at the backbone gives slightly under firm thumb pressure and registers 58-60°C at the thickest point — turbot is best served slightly translucent at the centre, as carry-over heat will bring it to 62°C during the 3-minute rest. Serve on the bone with the pan juices strained over, or with beurre blanc.

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