INGREDIENTS
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3 large Pink Lady apples, peeled, halved, cored
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 1/2 cup apple cider vinegar
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 1/4 cup (packed) light brown sugar
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 1/2 vanilla bean, halved lengthwise
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1 14-ounce package frozen puff pastry (such as Dufour), thawed
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All-purpose flour (for dusting)
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3Â 1/2 ounces almond paste
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4 tablespoons unsalted butter, cut into small pieces
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1 large egg, beaten to blend
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2 tablespoons granulated sugar
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Vanilla ice cream (for serving; optional)