Recipes

Potato-Mushroom Gratin

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Potato-Mushroom Gratin

Potato-Mushroom Gratin

amanda

Equipment

  • Chef Knife - Essential for cutting potatoes and mushrooms into uniform sizes.

  • Baking Dish (2-qt) - Ideal for baking gratins in the oven.

  • Stainless Steel Mixing Bowls - Useful for mixing ingredients together.

  • Oven Thermometer - Ensures accurate cooking temperature, crucial for a perfectly cooked gratin.

  • Cutting Board - Necessary to safely cut potatoes and mushrooms without damaging countertops.

  • Gas or Electric Stove Top Oven - Required for baking the gratin as per recipe instructions.

  • Potato Ricer (optional) - Presses cooked, peeled potatoes through a sieve to create a smooth texture.

  • Mixing Spoon or Spatula - Useful for stirring and mixing ingredients during preparation.

Ingredients

  • 5 tablespoons olive oil, divided

  • 2 1/2 pounds medium Yukon Gold potatoes, peeled, cut lengthwise into 1/8-inch-thick slices

  • 1 1/2 teaspoons coarse kosher salt plus additional for mushrooms

  • 3/4 teaspoon freshly ground black pepper plus additional for mushrooms

  • 1 1/4 cups (or more) heavy whipping cream, divided

  • 1 cup freshly grated Parmesan cheese (about 3 ounces), divided

  • 2 tablespoons chopped fresh thyme

  • 6 garlic cloves, thinly sliced

  • 12 ounces fresh crimini (baby bella) mushrooms, sliced

Instructions

1

Instruction 1

Preheat oven to 375°F. Brush 13x9x2-inch glass or oval ceramic baking dish with 2 tablespoons oil. Arrange 1/3 of potatoes, slightly overlapping, in dish. Sprinkle with 1/2 teaspoon coarse salt and 1/4 teaspoon pepper. Pour 1/3 cup cream over; sprinkle with 1/4 cup cheese. Repeat layering 1/3 of potatoes, 1/2 teaspoon salt, 1/4 teaspoon pepper, 1/3 cup cream, and 1/4 cup cheese 2 more times. Bake uncovered until potatoes are tender, adding cream by tablespoonfuls if dry, about 45 minutes. Remove from oven; maintain oven temperature.
2

Instruction 2

Sprinkle thyme and garlic slices over gratin. Toss mushrooms in medium bowl with 3 tablespoons oil; sprinkle with coarse salt and pepper. Arrange mushroom slices atop gratin around edge of dish. Drizzle with 1/4 cup cream; sprinkle with 1/4 cup cheese. Continue to bake uncovered until mushrooms are tender and potato edges are golden brown, about 20 minutes longer. DO AHEAD: Can be made 1 day ahead. Cool 1 hour in dish; cover and chill. Before serving, cut gratin into 10 pieces. Transfer to rimmed baking sheet. Cover with foil and rewarm in 350°F oven, 10 to 15 minutes.
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