INGREDIENTS
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•1 (14 oz.) package frozen puff pastry, defrosted completely
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•1 large egg, beaten
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•1 cup Parmesan, grated
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•1/2 cup Gruyere, shredded
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•1 tablespoon water
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•1/2 teaspoon cayenne pepper
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•kosher salt and freshly ground pepper, to taste
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•flour, for dusting