Gratin de Potiron

The Savoyard pumpkin gratin: tender slices of pumpkin baked with crème fraîche, garlic, and nutmeg under a golden crust of Gruyère, a rich, comforting dish of the French Alpine winter table

Origin: Savoy, France

The gratin is one of the great inheritances of the French Alpine kitchen, the cooking of Savoy and Dauphiné, where the cold winters and the dairy wealth of the mountains gave rise to a whole family of dishes baked with cream and cheese until golden. The gratin de potiron applies that logic to the pumpkin, an American arrival that reached France through the Atlantic ports and the overland trade with Italy in the sixteenth century and settled easily into the regional repertoire of autumn vegetables. The dish is built on the same principles as its famous cousin, the gratin dauphinois of sliced potato: thin slices of vegetable, a generous bath of crème fraîche scented with garlic and nutmeg, and a blanket of grated Gruyère that melts and browns into a burnished crust. The pumpkin's sweetness is tempered by the salt of the cheese and the warmth of the nutmeg, and its flesh, baked slowly, absorbs the cream entirely. It is at once rustic and refined, the kind of dish that accompanies a roast on a Sunday in the mountains or stands alone with a green salad as a supper against the cold.

Ingredients

900 g pumpkin or firm squash, peeled, deseeded, and sliced 5 mm thick
250 ml crème fraîche
100 ml whole milk
2 garlic cloves, crushed
0.25 tsp freshly grated nutmeg
120 g Gruyère, grated
1 knob butter, for the dish
salt and black pepper, to taste

Method

Heat the oven to 180°C and butter a gratin dish. Bring a large pan of salted water to the boil and blanch the pumpkin slices for 3 minutes, then drain very well and pat dry.
Warm the crème fraîche and milk together with the crushed garlic and nutmeg, season well with salt and pepper, and remove from the heat. Do not let it boil.
Layer the pumpkin slices in the buttered dish, seasoning between the layers and pouring over some of the garlic cream as you go, finishing with a final layer of cream.
Scatter the grated Gruyère evenly over the top and bake for 40 to 45 minutes, until the pumpkin is tender to the point of a knife and the surface is golden and bubbling.
Let the gratin rest for 10 minutes before serving, so it settles and firms enough to cut into neat portions.

Notes

A firm, dense squash such as a culinary pumpkin, kabocha, or potimarron (the chestnut-flavoured French variety traditional to this dish) holds its shape far better than a watery field pumpkin. Gruyère is classic, but Comté, Beaufort, or Emmental are all at home in the Savoyard tradition. For a richer gratin, use all crème fraîche and no milk; for a lighter one, increase the milk. A little thyme or a layer of softened onion between the pumpkin can be added, though the pure version lets the pumpkin and cream speak for themselves.

The Gastrographer

Name: Gratin de Potiron
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Yield: 4
Cuisine: France
Ingredients: 900 g pumpkin or firm squash, peeled, deseeded, and sliced 5 mm thick; 250 ml crème fraîche; 100 ml whole milk; 2 garlic cloves, crushed; 0.25 tsp freshly grated nutmeg; 120 g Gruyère, grated; 1 knob butter, for the dish; salt and black pepper, to taste

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