INGREDIENTS
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1 14.5-ounce box refrigerated pie dough or PUFF PASTRY
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All-purpose flour, for dusting
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2 tablespoons unsalted butter, at room temperature
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1/2 cup granulated sugar
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1 1/8 teaspoons ground cinnamon
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5 assorted apples, such as McIntosh, Granny Smith and Pink Lady (about 2 pounds)
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Juice of 1/2 lemon
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2 tablespoons flour
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1 teaspoon vanilla extract
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1 large egg, lightly beaten
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2/3 cup confectioners' sugar
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2 tablespoons milk, plus more if needed