Cooks Illustrated Scalloped Potatoes Recipe 385

Steps:

• Preheat the oven to 450 degrees F. Lightly grease an 18-by-13-inch sheet pan with the butter.
• Bring the cream, garlic, thyme, 1/2 teaspoon salt and 1/4 teaspoon pepper to a simmer in a small saucepan over medium heat, then turn off stove.
• Thinly slice the potatoes on a mandoline or vegetable slicer (about 1/8-inch-thick rounds.) Arrange half the potato slices into a single, overlapping layer on the sheet pan, and sprinkle evenly with salt and half the grated Parmesan. Top with the remaining potato slices and sprinkle with salt. Drizzle the hot cream mixture evenly over the potatoes.
• Cover the pan with foil and bake until the potatoes are tender when pierced with a paring knife, about 20 minutes. Carefully remove the foil and sprinkle the potatoes with Gruyere and the remaining Parmesan. Cook uncovered until very brown and crusty on top, rotating the pan halfway through, 15 to 20 minutes more.

Steps:

• Preheat the oven to 350 degrees F. Grease an 8-inch square baking dish with unsalted butter.
• Peel the potatoes and cut them into 1/8-inch-thick slices using a mandoline or sharp knife.
• Add the sliced potatoes, heavy cream, whole milk, 2 tablespoons butter, garlic, thyme, 1 1/2 teaspoons salt, 1/2 teaspoon pepper and the nutmeg to a medium saucepan. Bring to a simmer over medium heat and cook, stirring occasionally, until the potatoes are tender and almost cooked through but still hold their shape, about 5 minutes. (They should not be soft and falling apart.) Remove the saucepan from the heat.
• Add the Gruyere and Parmesan, stirring gently to combine. Pour the potato mixture into the prepared baking dish. Bake until the top is light golden brown and the potatoes are cooked through and tender, about 45 minutes. Let rest for 10 minutes before serving.

Steps:

• Heat oven to 350 degrees. Butter a 9-inch deep-dish glass pie plate.
• In a wide saucepan, combine 3 tablespoons butter, garlic, leek and onions. Place over medium-low heat and sauté until mixture is light golden, about 15 minutes. Add 2 tablespoons tarragon, the cream and potatoes, and mix well. Simmer gently until potatoes are barely tender, about 15 minutes. Season with salt and white pepper to taste.
• Using a slotted spoon, transfer potatoes to pie plate, spreading them evenly and pressing lightly to compact them. Drizzle with 2 to 3 tablespoons of cream from pan. Cover with foil and bake for 40 minutes. Remove foil and continue to bake until top is light golden brown, about 10 more minutes. Remove from heat and allow to rest for 15 minutes. Garnish with a sprinkling of chopped tarragon, and serve.