INGREDIENTS
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3 tablespoons all-purpose flour, plus more for work surface
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1 box (17.25 ounces, 2 sheets) frozen puff pastry, thawed
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1 bag (12 ounces) frozen cherries
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1/3 cup granulated sugar
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1 tablespoon fresh lemon juice
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1 large egg yolk, beaten with 2 teaspoons water (for egg wash)
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2 to 3 tablespoons coarse sanding (or granulated) sugar