INGREDIENTS
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1/2 cup butter
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2 medium leeks, sliced
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1/2 cup all-purpose flour
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1 (14.5-oz.) can chicken broth
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3 cups chopped cooked chicken
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1 1/2 cups frozen cubed hash browns with onions and peppers
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1 cup matchstick carrots
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1/3 cup chopped fresh flat-leaf parsley
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1/2 teaspoon salt
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1/2 teaspoon freshly ground pepper
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1 (17.3-oz.) package frozen puff pastry sheets, thawed
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1 large egg