Freezer Chicken Pot Pies

Name: Freezer Chicken Pot Pies
Ingredients: 1 1/2 pounds boneless, skinless chicken breasts; 2 tablespoons vegetable oil; 5 1/2 cups low-sodium chicken broth; 2 tablespoon unsalted butter; 1 medium onion , chopped fine; 3 medium carrots , peeled and chopped; 1 celery rib, chopped fine; 1/2 cup all-purpose flour; 1/4 cup milk; 2 teaspoons minced fresh thyme leaves; 2 tablespoons lemon juice; 2 (15-ounce) boxes Pillsbury Ready to Roll Pie Crust; 1 large egg , plus one large egg, beaten, for baking; 1 1/2 cups frozen peas