How To Make Beautiful Roasted Crispy Potatoes

  • Preheat oven to 375 degrees.

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  • In a small bowl, combine butter and oil. Brush bottom of a round 9-inch baking dish with some butter mixture.

  • With a sharp knife or mandoline, slice potatoes very thinly crosswise.

  • Arrange potato slices vertically in dish. Wedge shallots throughout. Sprinkle with salt and red-pepper flakes (if using); brush with remaining butter mixture.

  • Bake 1 1/4 hours. Add thyme and bake until potatoes are cooked through with a crisp top, about 35 minutes more.