INGREDIENTS
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1/2 17.3 ounce package frozen puff pastry, thawed (1 sheet)
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1/4 cup sugar
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1 tablespoon cornstarch
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1 tablespoon finely chopped crystallized ginger
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1 12 ounce package frozen mixed berries, thawed and drained (about 2-1/2 cups)
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1 egg
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2 tablespoons water
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Coarse sugar (optional)