Follow these straightforward steps to create your Easy Chicken Pot Pie:

1. Preheat the Oven: Begin by preheating your oven to 425°F (220°C).

2. Cook Vegetables: In a large skillet, heat olive oil or butter over medium heat. Add diced onions and celery. Sauté for about 5 minutes until they soften.

3. Add Chicken and Veggies: Stir in the shredded chicken and the frozen mixed vegetables. Cook for an additional 2-3 minutes.

4. Make the Sauce: Sprinkle the flour over the chicken and vegetable mixture. Stir well to coat everything evenly. Gradually add chicken broth, stirring continuously until the sauce thickens.

5. Season: Mix in milk, garlic powder, thyme, salt, and pepper. Allow the mixture to simmer for 5-7 minutes, until it reaches a creamy consistency.

6. Fill the Pie Crust: Pour the filling into the unbaked pie crust, spreading it evenly. If you have excess filling, save it for another pie or a dish.

7. Bake: Cover the filling with the top layer of pie crust, crimping the edges to seal it tightly. Cut a few slits in the top for steam to escape. Bake in the preheated oven for 30 minutes or until the crust is golden brown.