Double-Crust Chicken Pot Pie - chicken

Ingredients

• 6 boneless, skinless chicken breast halves, cut in 1-inch pieces
• 1 medium onion, chopped
• 2 Tbsp. butter or margarine, melted
• 1 c. fresh mushrooms, sliced
• 3/4 c. carrots, scraped and chopped
• 1 stalk celery, chopped
• 3/4 c. LeSueur English peas
• 3/4 c. potatoes, peeled and chopped
• 1 c. chicken broth
• 1/4 c. Chablis or other white wine
• 1/2 tsp. parsley flakes, dried
• 1/4 tsp. ground white pepper
• 1 bay leaf
• 2 Tbsp. cornstarch
• 2 Tbsp. water
• 1 (10 3/4 oz.) can cream of mushroom soup
• 1/2 c. sour cream
• 3/4 c. (3 oz.) Cheddar cheese, shredded
• 2 pastry crusts
• 1 egg yolk, lightly beaten
• 1 Tbsp. milk