Tartiflette is the beloved winter dish of Haute-Savoie — a gratin of sliced potatoes, lardons, and onions baked under a split wheel of Reblochon cheese that melts into a creamy, oozing, pungent blanket during baking. Unlike the older gratin savoyard (where cheese is layered throughout), tartiflette is a modern creation from the 1980s, invented by the Reblochon producers' syndicate to boost sales — but its deliciousness has made it a genuine regional classic embraced across France, served in every ski station restaurant from Chamonix to Méribel. The method is straightforward and satisfying. Boil 1kg of waxy potatoes in their skins until just tender, then peel and slice thickly (1cm). Render 200g of thick-cut lardons until golden and crisp. Remove the lardons, and in the rendered fat, cook 2 sliced onions until soft and golden (10-12 minutes). Combine the potatoes, lardons, and onions in a gratin dish. Deglaze the pan with 100ml of dry white wine (Savoyard, naturally) and pour over the potato mixture. Season with pepper (the lardons and cheese provide salt). Cut a whole Reblochon (450g) in half horizontally to create two discs. Place these cut-side down on top of the potato mixture — the rind side faces up, and during baking the cut surface melts downward into the potatoes while the rind protects the top and creates a beautiful, wrinkled, golden cap. Bake at 200°C for 20-25 minutes until the Reblochon is bubbling, oozing at the edges, and the rind has turned golden-brown. The cheese should be flowing but not completely melted — it should hold its shape as a cap that can be cut into portions, each one releasing a stream of molten Reblochon onto the potatoes below. Serve immediately with a green salad dressed with walnut oil and a glass of Apremont or Roussette de Savoie. This is the ultimate ski food — rich, warming, rib-sticking, and utterly irresistible.
Waxy potatoes, boiled and sliced thick (1cm). Lardons rendered, onions cooked in the fat. White wine deglaze poured over the assembled dish. Whole Reblochon split horizontally, placed cut-side down on top. 200°C for 20-25 minutes until cheese bubbles and oozes. Serve immediately — the cheese sets as it cools.
Farm Reblochon (fermier, with a green casein mark) is significantly more flavourful than industrial. If Reblochon is unavailable, Taleggio or Vacherin are the closest substitutes. A few gratings of nutmeg in the potato layer add subtle warmth. Some versions add crème fraîche to the potatoes before the cheese layer for extra richness. For a lighter version, replace half the potatoes with thinly sliced turnips. The dish can be assembled hours ahead and refrigerated — add the cheese and bake just before serving.
Using the wrong cheese — only Reblochon has the right melting properties and flavour. Not splitting the Reblochon horizontally — the cut face must contact the potatoes for proper melting. Over-baking until the cheese is completely liquid and has pooled to the bottom. Using floury potatoes that crumble. Skipping the wine deglaze, which provides essential acidity to cut the richness.
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