2 cups cooked and shredded chicken
1 cup sliced carrots
1 cup frozen green peas
1/2 cup sliced celery
1/3 cup butter
1/3 cup chopped onion
1/3 cup flour
1/4 teaspoon black pepper
1/4 teaspoon garlic powder
2 cups chicken broth
3/4 cup milk
2 ( 9 inch) unbaked pie crusts
Preheat oven to 425 degrees F (220 degrees C). Spray a 9 inch pie dish with cooking spray and gently press one of the crust into the bottom pushing the sides down evenly. Bake in the preheated oven for about 8 minutes.
Meanwhile, combine carrots, peas, and celery in a saucepan with the chicken broth. Bring to a boil and boil for 15 minutes. Drain and reserve broth. Stir the chicken into the vegetable mix.
Cook the onions with melted butter in the saucepan over medium heat until soft. Stir in flour slowly (use a sifter if you have one) stirring continuously, pepper, salt if needed, and garlic powder. Slowly stir in chicken broth and milk. Simmer over medium low heat until thick. Remove from heat.
Spread the chicken mixture evenly in the bottom pie crust. Pour hot broth mixture over the chicken, and cover with the top crust, pinching edges into the rim of the pie plate/bottom crust.
Bake in the preheated oven on a cookie sheet for 30-35 minutes or until pie is golden and filling is bubbly.