Quick Overview
Cook the chicken and vegetables.
Prepare the creamy filling.
Assemble the pie and bake.
Detailed Steps
Prepare the Filling
Preheat your oven to 425°F (220°C).
Combine cubed chicken, carrots, peas, and celery in a saucepan. Cover with water, boil, and cook for 15 minutes. Drain and set aside.
Make the Sauce
In another saucepan, melt butter over medium heat. Add chopped onion and sauté until translucent, about 5-7 minutes.
Stir in flour, salt, pepper, and celery seed, cooking for 1-2 minutes to form a roux.
Gradually whisk in chicken broth and milk. Reduce heat to medium-low and simmer for 5-10 minutes until thickened. Remove from heat.
Assemble the Pie
Place one pie crust in a 9-inch pie dish, pressing it against the sides.
Add the cooked chicken and vegetables to the crust.
Pour the hot broth mixture over the filling.
Cover with the second pie crust, seal the edges, and trim any excess dough. Make small slits in the top crust to allow steam to escape.
Bake
Bake in the oven for 30-35 minutes or until the crust is golden brown and the filling is bubbling.
Let the pie cool for 10 minutes before serving.