Dana Slatkin, "the Beverly Hills Farm Girl", shares her Fresh and Easy recipe for a Potato Mushroom Gratin. Not only is this side dish incredibly comforting, but the ingredients are in season and super fresh. Enjoy!
*And, be sure to CLICK HERE to check out Dana's fast and easy tip for cleaning mushrooms!*
Wild Mushroom Potato Pie
Serves 8-10
2 tablespoons unsalted butter, plus more for baking dish
1 onion, finely diced
2 pounds assorted wild mushrooms (such as shiitake, chanterelle, oyster), washed, dried, and coarsely chopped
¼ cup white wine
Kosher salt and freshly ground black pepper
1 cup (about 4 ounces) grated Gruyere cheese
1 cup (about 3½ ounces) grated Parmesan cheese
1½ pounds (about 3-4) Yukon Gold Potatoes, peeled
3 sprigs fresh thyme
1/2 cup heavy cream
1. Preheat the oven to 350°F. Butter a 9"x13" baking dish and set aside.
2. Melt the butter in a very large skillet over medium high heat. Add the onion and sautee until softened, about 5 minutes. Add the mushrooms and cook, stirring occasionally, until they have released their juices and most of the liquid has evaporated, about 5 minutes.
3. Add the white wine and cook, stirring occasionally, until dry, 3-5 minutes more. Season with salt and pepper, remove from heat, and set aside.
4. Combine the cheeses and set aside. Using a mandoline or slicer, slice the potatoes 1/8" thick. Place a layer of potato slices, slightly overlapping, in the bottom of the baking dish. Sprinkle with half the chopped thyme, salt and pepper. Sprinkle with half of the grated cheese and mound the mushroom mixture on top. Sprinkle again with all but 2 tablespoons of the cheese. Arrange the remaining potato slices around the edge of the pie. Pour the cream over the top and season once again with salt, pepper, and remaining thyme. Sprinkle with the remaining cheese.
5. Bake until the filling is bubbly, about 1½ hours. Come back after an hour later to check that the top is not too dark. If it is browning too quickly, cover loosely with foil and continue baking. When it is golden and the potatoes can be pierced easily with a fork, remove it from the oven. Allow it to sit for 10 minutes for the juices to settle in before serving.
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