Chicken Demi-Deuil

Working from the neck cavity, use your fingers to carefully loosen the skin from the breasts and thighs of the chicken, creating pockets without tearing. Slide truffle slices in a single, overlapping layer beneath the skin over both breasts and as far over the thighs as the skin allows. Press the skin gently back down so the slices lie flat and are visible through the skin.

Truss the chicken tightly with kitchen twine to keep its shape during poaching. Halve the onion, carrots, celery, and leek; separate the garlic head; measure the peppercorns, cloves, and salt; and set everything aside.

Rest the truffled chicken uncovered in the refrigerator for a minimum of 12 hours and up to 24 hours, so the truffle aroma fully penetrates the meat.

Remove the chicken from the refrigerator 30 minutes before cooking. Combine the chicken stock and cold water in a pot large enough to submerge the chicken comfortably. Add the onion, carrots, celery, leek, garlic, bouquet garni, peppercorns, cloves, and salt. Bring to a full boil over high heat.

Lower the chicken, breast-side up, into the boiling liquid. Return to a boil, then immediately reduce the heat to a bare simmer — the surface should shiver and produce only the occasional lazy bubble, around 80–85°C. Skim any foam that rises during the first 10 minutes.

Poach the chicken, partially covered, for 60 minutes, maintaining the gentle simmer throughout. Begin checking for doneness at 55 minutes by inserting an instant-read thermometer into the thickest part of the thigh, away from bone — the target internal temperature is 74°C.

Lift the chicken carefully from the broth, tilt it so any liquid inside runs back into the pot, then rest it breast-side up on a warm plate tented loosely with foil. Strain 500 ml of the broth through a fine-mesh sieve into a clean saucepan and reserve; keep the remaining broth warm over very low heat to warm the carved chicken before serving if needed.

Make the velouté: melt the butter in a medium saucepan over medium heat until foaming. Add the flour all at once and whisk constantly for 2 minutes until the roux turns pale gold and smells faintly nutty.

Ladle the hot strained broth into the roux gradually, whisking vigorously between each addition to prevent lumps. Bring to a gentle simmer and cook, stirring, for 8 minutes until the sauce coats the back of a spoon with no floury taste remaining.

Whisk the egg yolk and double cream together in a small bowl. Remove the sauce from the heat and whisk in the cream mixture in a slow, steady stream — do not return to a boil or the yolk will curdle. Stir in the cognac, taste, and adjust seasoning with salt and white pepper.

Remove the trussing twine. Carve the chicken at the table, presenting the truffle-marbled breasts whole before slicing. Spoon the velouté generously over each portion and serve immediately with steamed Ratte potatoes or a simple watercress salad.