Double Crust Chicken Pot Pie

Ingredients:

• 1/2 cup butter 
• 2 small onions, diced 
• 1/2 cup all-purpose flour 
• 1 (14.5-oz.) can chicken broth 
• 3 cups chopped cooked chicken 
• 1 1/2 cups frozen cubed hash browns 
• 1 16 ounce bag frozen mixed vegetables 
• 1/3 cup chopped fresh flat-leaf parsley 
• 1/2 teaspoon salt 
• 1/2 teaspoon freshly ground pepper 
• 1 (17.3-oz.) package frozen puff pastry sheets, thawed 
• 1 large egg 

Directions:

1. Preheat oven to 375°. 
2. Melt butter in a large skillet over medium heat; add onions, and sauté 3 minutes. Sprinkle with flour; cook, stirring constantly, 3 minutes. 
3. Whisk in chicken broth; bring to a boil, whisking constantly. Remove from heat; stir in chicken and next 5 ingredients. 
4. Roll each pastry sheet into a 12- x 10-inch rectangle on a lightly floured surface. Fit 1 sheet into a 9-inch deep-dish pie plate; spoon chicken mixture into pastry. Place remaining pastry sheet over filling in opposite direction of bottom sheet; fold edges under, and press with tines of a fork, sealing to bottom crust. Whisk together egg and 1 Tbsp. water, and brush over top of pie. 
5. Bake on lower oven rack 55 to 60 minutes or until browned. Let stand 15 minutes.