Maine Chicken Pie

I got this recipe from my father-in-law. Best Chicken Pie I've ever had. Passive cook time reflects simmering chicken.

• Ready In: 4 hrs 40 mins
• Serves: 6-8
• Yields: 1 pie

Ingredients

•  pastry for double-crust pie
• 1  stewing chicken
• 1 1⁄2 quarts water
• 2  teaspoons kosher salt
• 1  small onion, chopped
• 1  carrot, pared and chopped
• 1  stalk celery, chopped
• 3 1⁄2 cups chicken broth
• 1⁄2 cup  sifted flour
• 1⁄2 teaspoon  onion salt
• 1⁄2 teaspoon  celery salt
•  pepper, 3 grains
• 2 -3  drops  yellow food coloring

Directions

1. Place chicken in a large kettle add water, 1 teaspoons salt, onion, carrot and celery. Simmer, covered until tender 3-31/2 hours.
2. Remove chicken, strip meat from bones, removing in large pieces, strain broth. Refrigerate chicken and broth when cool.
3. Combine flour, onion salt, celery salt and remaining 1 teaspoons kosher salt with 1/2 cup chicken broth, mix until smooth.
4. Put 3 cups chicken broth in skillet. Heat and add flour mixture with a wire whisk to prevent lumping.
5. Cook over medium heat, stirring constantly until mixture is smooth and thickened, add food coloring. Add chicken and blend well.
6. Line 9" deep dish pie pan with pastry. Fill with chicken mixture. Adjust top crust, cut vents and flute edges.
7. Bake 400' 45 minutes or until browned.