Deep Dive
The 10-minute brine and fish prep
Fallow starts by making a 10% salt brine with bay leaf, peppercorns (black, white, pink), and thyme — classic Ramsay-style aromatics. The brine can be made a day ahead so flavors fully infuse. He removes the cod's skin to prevent flabbiness when cooked, then trims the bloodline and squares off the edges for a refined plating. The key move is the submersion itself: 10 minutes of brining seasons the exterior aggressively while the short time prevents salt from penetrating deep into the flesh. After brining, he wraps the fish in tissue paper and refrigerates it for 30 minutes to 2 hours to set the protein structure and firm up the surface. This combination of rapid salting followed by controlled resting is what locks in moisture rather than drying it out.
Brown butter at 180°C is the foundation
Fallow explains that bernoisette (brown butter) is the other critical element. He heats butter slowly and lets it froth, cool, then caramelize — eventually reaching 180°C where the milk solids separate and take on deep color. He monitors temperature with a probe rather than guessing, which is essential because the process looks chaotic if you're not expecting it. Once the butter hits 180°C, he takes the pan off heat to cool slightly, then strains it through cheesecloth to remove the caramelized solids, leaving behind clean, silky brown butter. He places the brined cod (which is stone cold from the fridge) into the warm butter at around 55-60°C. The cold fish drops the butter temperature initially, but the oven holds it at 55°C for the next 15-25 minutes, allowing the fish to cook gently and evenly. This low-temperature confiture in fat is what creates the final texture — tender, almost melting, with proteins aligned in the same direction.
The potato crumb and sauce build
While the fish cooks, Fallow prepares the crispy potato crumb by grating potatoes on a box grater's fine side, then rinsing them under cold running water until the water runs completely clear. This removes excess starch that would otherwise brown the crumb before it crisps. He wrings the potato dry in cheesecloth (multiple squeezes matter), breaks up any clumps, then fries the potato at 160-180°C in oil until it's golden and fine. The oil temperature drops significantly when the potato enters, so he keeps heat on medium-low. Once golden, he passes the crumb through a sieve and spreads it on cloth immediately to prevent carryover cooking. For seasoning, he blends nori seaweed sheets (a substitute for Ramsay's harder-to-find salted kombu) into powder, then tosses it with fresh chopped dill, tarragon, and parsley to bind the dry crumb. Simultaneously, he builds a classic sauce: shallots and garlic sweated in butter, white wine reduced by half, fish stock added and reduced further, then finished with double cream and lemon juice — all kept on low heat so flavors meld without scorching.
Asparagus and the final plate
Fallow cooks asparagus by cutting it (not snapping, for a neater edge) and placing it in a hot pan with just a tablespoon of rapeseed oil and a lid. The water released from the asparagus steams it gently while the oil conducts heat, and crucially, the absence of added water locks in the chlorophyll, keeping it vibrant green. He stirs occasionally to prevent caramelization on one side. When the fish comes out of the oven, it's placed on a wire rack to drain excess butter. He seasons it with pepper, then tops it with the seasoned potato crumb — the green herb moisture helps the crumb adhere. The final plate layers asparagus on the bottom, then the fish on top, finished with the reduced sauce and a drizzle of high-quality olive oil. The result is what Fallow calls iridescence: the curing and low-temperature cooking aligned all the fish's proteins in the same direction, creating a visible rainbow shimmer that's nearly impossible to achieve without understanding this specific technique.