There's a very specific kind of comfort food that operates through contrast rather than uniformity — dishes where one element pushes back slightly against the richness surrounding it. Endive au gratin is that dish. The braised endive retains a gentle, almost medicinal bitterness that cuts through a bechamel loaded with emmental, and the result is not the numbing warmth of cauliflower cheese but something that actually holds your attention across the whole plate. Harris traces this dish directly to Simon Hopkinson at Hilaire, one of the defining London restaurants of the 1980s, and that lineage matters: this is classical French bistro cooking with a clear chain of custody. The traditional version wraps each endive in cooked ham and uses comté; Harris's vegetarian adaptation replaces the ham with dark, crisp-fried mushrooms and swaps emmental for the comté, and both decisions are structurally sound rather than merely permissive. The mushrooms, cooked until they go slightly leathery and their juices are fully reabsorbed, deliver the umami and textural contrast the ham was providing. This isn't a compromise — it's a rewrite that holds. The recipe requires patience in three distinct phases and the patience is non-negotiable. The milk infuses for a full hour with bay, peppercorns, onion, and parsley — this is the bechamel's backbone and skipping it produces a sauce that tastes of flour and cheese rather than something more layered. The mushrooms need to actually brown and turn leathery, which takes longer than most people expect; pulling them too early leaves you with something soft and forgettable. The endives roast covered for up to an hour until completely tender, and the outer leaves that brown and crisp in the process get discarded. Trust the process here — the inner leaves that emerge are buttery, slightly collapsed, and hold the sauce beautifully. The bechamel is a classic roux construction, whisked over gentle heat for five minutes to cook out any raw flour taste, finished with cayenne and two-thirds of the cheese stirred in before the gratin gets its final scatter of cheese under the grill. Harris specifies individual gratin dishes or one large one — the individual dishes produce better surface-area-to-depth ratios for the gratin crust, which is where the dish's textural payoff lives. A chilled beaujolais alongside is not a suggestion to be ignored. Harris is chef and co-owner of Bouchon Racine in London EC1, and this recipe is drawn from his book The Racine Effect, published by Quadrille at £40. It is the kind of recipe — deceptively simple in its ingredient list, demanding in its execution — that defines what a good restaurant cookbook actually is: something that transfers real technique rather than just names and measurements.