INGREDIENTS
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2 cups all-purpose flour, plus more for surface
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1/4 cup granulated sugar
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3/4 teaspoon coarse salt
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8 ounces (2 sticks) cold unsalted butter, cut into 1/2-inch pieces
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1/4 cup ice water
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1 large egg, lightly beaten
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Coarse sanding sugar, for sprinkling
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Creme fraiche, for serving
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1 1/2 pounds Concord grapes, stems removed
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3 tablespoons fresh lemon juice
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1 cup granulated sugar
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Salt