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Potato Gratin with Mushrooms and Gruyère

This potato gratin with mushrooms and Gruyère is the ultimate vegetarian comfort food, offering a sophisticated twist on the classic dauphinoise. The dish layers tender Yukon Gold potatoes with a savoury mixture of sautéed leeks and earthy mixed mushrooms, all bound together in a rich double cream sauce. The addition of nutty Gruyère cheese provides a beautifully golden, bubbling crust that makes this bake an instant favourite for any dinner party or family gathering.

Ideal as a substantial side dish for a Sunday roast or served as a decadent main course alongside a crisp green salad, this gratin is both versatile and satisfying. By par-boiling the potatoes in the seasoned cream, you ensure a perfectly tender texture and a deeply flavoured sauce every time. It is a wonderful make-ahead option for busy hosts, as the mushroom filling can be prepared several hours in advance.

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Ingredients for Potato Gratin with Mushrooms and Gruyère

  • 60ml olive oil

  • 950ml finely chopped leeks (white and pale green parts only

  • about 3 large)

  • 675g 1/2-inch cubes assorted mushrooms (such as crimini and stemmed shiitake

  • about 1500g )

  • 2 garlic cloves, minced

  • 1.4kg Yukon Gold potatoes, peeled, cut into 1/8-inch-thick slices

  • 475ml double cream

  • 1 teaspoon (or more) salt

  • 1/2 teaspoons (or more) freshly ground black pepper

  • 120g coarsely grated Gruyère cheese

Heat 60ml oil in large skillet over medium-high heat. Add leeks; sauté until soft and lightly browned, 10 to 12 minutes. Add mushrooms, sprinkle with salt and pepper, and sauté until soft and liquid evaporates, 7 to 8 minutes. Add garlic; sauté 1 minute. Season with salt and pepper. Set aside. DO AHEAD: Can be made 4 hours ahead. Let stand at room temperature.

Preheat oven to 191°C. Pat potato slices dry with kitchen towel. Combine cream, 1 teaspoon salt, and 1/2 teaspoons pepper in large pot. Add potatoes. Bring to boil; reduce heat to medium and simmer, covered, 10 minutes, stirring occasionally. Remove lid; simmer until cream is reduced by about half and potatoes are partially cooked, stirring often and watching closely to prevent mixture from burning, about 3 minutes. Season with salt and pepper.

Brush 13 x 9 x 2-inch glass or ceramic baking dish with oil. Transfer half of potato mixture to dish, spreading out in even layer. Spoon mushroom mixture over in even layer. Spoon remaining potato mixture over, spreading in even layer. Sprinkle cheese over. Cover with foil, tenting in centre to prevent cheese from sticking to foil. Bake 30 minutes. Uncover; bake until potatoes are tender and top is brown, 20 to 25 minutes longer. Let rest 10 minutes before serving.

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While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Historique de l'article

Les informations contenues dans cette page ont été évaluées par des cliniciens qualifiés.

  • 28 janvier 2026 | Publié à l'origine

    Auteur: :

    UK recipe editors

    Examiné par des pairs

    UK recipe editors
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