Preheat oven to 375°. In a Dutch oven, saute potatoes, carrots, onion and celery in butter and oil until tender. Stir in flour until blended; gradually add broth. Bring to a boil; cook and stir 2 minutes or until thickened. Stir in turkey, peas, 1/2 cup cream, parsley, garlic salt and pepper. , Spoon into two ungreased 9-in. pie plates. Unroll crusts; place over filling. Trim crusts and seal to edge of pie plates. Cut out a decorative center or cut slits in crusts. In a small bowl, whisk egg and remaining 1 tablespoon cream; brush over crusts., Bake until golden brown, 40-45 minutes. Let stand 10 minutes before cutting. Freeze option: Cover and freeze unbaked potpies up to 3 months. To use, remove from freezer 30 minutes before baking (do not thaw). Preheat oven to 425°. Place pie on a baking sheet; cover edge loosely with foil. Bake 30 minutes. Reduce oven setting to 350°; remove foil. Bake until golden brown and a thermometer inserted in center reads 165°, 55-60 minutes longer.