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Potato Gratin with Porcini Mushrooms and Mascarpone Cheese

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Potato Gratin with Porcini Mushrooms and Mascarpone Cheese

Potato Gratin with Porcini Mushrooms and Mascarpone Cheese

amanda

Equipment

  • Kitchen Knife Set - Essential for chopping potatoes and mushrooms finely

  • Porcelain Baking Dish - Perfect for baking gratins as it distributes heat evenly

  • Mandoline Slicer - Useful for uniformly slicing the potatoes, making them crispy and consistent

  • Oven Thermometer - Ensures your oven is at the correct temperature for perfect gratin cooking

  • Heavy-Duty Cheese Grater - Useful for grating mascarpone cheese and any additional cheeses required in recipes like this

  • Digital Food Scale - For precise measurements of ingredients, crucial in baking recipes

  • Porcelain Tile Cleaner (not directly used but useful post-cooking)

  • Non-Stick Baking Mat - Useful for preventing potatoes from sticking and simplifying baking

Ingredients

  • 4 ounces dried porcini mushrooms*

  • 1 cup boiling water

  • 2 tablespoons (1/4 stick) butter

  • 2 tablespoons extra-virgin olive oil

  • 1/4 cup plus 2 tablespoons grated Parmesan cheese

  • 1 1/2 cups mascarpone cheese** (from about 1 1/2 seven-ounce containers)

  • 1 cup whipping cream

  • 3 garlic cloves, chopped

  • Pinch of freshly grated nutmeg

  • 2 1/2 pounds russet potatoes (about 5 large), peeled, cut crosswise into 1/8-inch-thick slices

Instructions

1

Instruction 1

Place porcini and 1 cup boiling water in medium bowl. Place small bowl atop mushrooms to keep submerged. Let soak 20 minutes. Drain and coarsely chop mushrooms.
2

Instruction 2

Melt butter with oil in medium skillet over medium heat. Add mushrooms and sauté until beginning to brown, about 3 minutes. Sprinkle with salt and pepper. Remove from heat. Whisk 1/4 cup Parmesan and next 4 ingredients in small bowl; season with salt and pepper. DO AHEAD: Mushrooms and cheese mixture can be prepared 1 day ahead. Cover separately and chill.
3

Instruction 3

Preheat oven to 325°F. Butter wide shallow 2-quart baking dish. Arrange 1/4 of potato slices in bottom of dish. Sprinkle lightly with salt and pepper. Scatter 1/4 of mushrooms over. Repeat. Spread half of cheese mixture over, shaking dish to settle. Repeat with remaining potatoes and mushrooms in 2 layers each; spread remaining cheese mixture over. Sprinkle 2 tablespoons Parmesan over. Place gratin dish on rimmed baking sheet.
4

Instruction 4

Bake gratin until top is brown and sauce is bubbling at edges, about 1 hour 15 minutes. Let gratin rest 15 minutes before serving. DO AHEAD: Can be made 2 hours ahead. Let stand at room temperature. Tent loosely with foil and rewarm in 300°F oven 20 minutes.
5

Instruction 5

*Available in the produce section of many supermarkets and at specialty foods stores and Italian markets.
6

Instruction 6

**Italian cream cheese; sold at many supermarkets and at Italian markets.
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