Mushroom Pommes Anna
- Mushroom Duxelle:
- 3 tablespoons olive oil
- 2 shallots, finely chopped
- 3 cloves garlic, finely chopped
- 1 cup dry white wine
- 2 pounds cremini mushrooms, finely chopped
- 3 tablespoons finely chopped fresh thyme
- Salt and freshly ground pepper
- 2 sticks unsalted butter, clarified
- 4 large potatoes, peeled and sliced thinly on a mandoline
- Salt and pepper
- Mushroom Duxelle
For the Mushroom Duxelle: Heat olive oil in a large saute pan over high heat until almost smoking, add the mushrooms and cook until golden brown and dry. Add the shallots and garlic and cook until soft. Add the wine and cook until reduced. Add the thyme and season with salt and pepper to taste.
For the Potatoes: Preheat oven to 400 degrees F. Pour 2 tablespoons of the clarified butter into an iron skillet and heat over high heat. Arrange potatoes slices in the pan in concentric circles, overlapping the slices, drizzle each layer with butter, season with salt and pepper and spread some of the mushroom duxelle over the entire surface. Repeat to make 4 to 5 layers. Heat the pan on top of the stove until the butter bubbles. Transfer the pan to the oven and bake until the potatoes are golden brown and soft, 20 to 25 minutes. Press the potatoes with a pot lid during the baking once or twice to keep them flat. Remove from the oven and pour out excess butter. Let sit 10 minutes before inverting onto a round platter.
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