INGREDIENTS
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1 1/4 cups all-purpose flour, plus more for dusting
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2 teaspoons granulated sugar
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Pinch of salt
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1 stick cold unsalted butter, cut into 1/2-inch pieces
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1 large egg
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1 cup walnuts
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1/4 cup plus 1 tablespoon granulated sugar
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1 large egg
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3 tablespoons unsalted butter, diced
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1/4 teaspoon vanilla extract
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Pinch of salt
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3 Golden Delicious or other firm baking apples (about 1 1/4 pounds)
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1/4 cup apricot preserves
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Confectioners' sugar, for dusting (optional)