Potato-Mushroom Pie
Ingredients
- 2 tbsp unsalted butter
- 1 med onion, cut into 1/2" dice
- 2 lbs assorted mushrooms, coarsely chopped ( see below )
- 1/4 cup dry white wine ( see below )
- 1.5 tsp coarse salt
- buncha fresh coarsely ground pepper
- 1 cup grated Gruyere cheese (approx 4 oz) ( see below )
- 1 cup finely grated Parmesan cheese (approx 3.5 oz)
- 2 lbs Yukon Gold potatoes, peeled and cut into 1/8" rounds
- 1 tbsp finely chopped thyme
- 3/4 cup whole milk
- 1/2 cup heavy cream
Instructions
Prep
- Preheat oven to 350 degrees. Butter a 13-by-9-inch baking dish; set aside.
- Melt butter in a large skillet over medium heat.
- Add onion; cook, stirring occasionally, until softened, about 5 minutes.
- Add half of the mushrooms; cook until they are slightly softened.
- Add remaining mushrooms; cook, stirring occasionally, until mushrooms have released their juices and most of the liquid has evaporated, 8 to 10 minutes.
- Add wine; cook, stirring occasionally, until liquid has evaporated, 3 to 5 minutes.
- Remove from heat. Season with salt and pepper.
Assembly
- Combine cheeses in a small bowl; set aside.
- Cover bottom of prepared dish with potato slices, slightly overlapping them.
- Sprinkle with half of the thyme and a pinch each of salt and pepper.
- Sprinkle with 1/3 of the cheese and half of the mushroom mixture.
- Repeat layering process, using all but 2 tablespoons cheese.
- Arrange remaining potato slices, slightly overlapping, around the edge of the dish.
- Stir together milk and cream in a bowl, and pour over top.
- At this point, dish can be refrigerated, covered, up to 1 day; let stand at room temperature 30 minutes before baking.
Baking Time
- Cover loosely with foil, and bake until bubbling, about 1 hour.
- Remove foil, and sprinkle with reserved cheese.
- Bake until top is golden, 20 to 30 minutes more.
- Transfer dish to a wire rack; let cool 10 minutes before serving.
Notes
- For the mushrooms, go for chanterelle, oyster, or black trumpet.
- Wine substitute = 50-50 vinegar/lemon juice-water