Creating Classic Chicken Pot Pie is easy when you follow these simple steps:

1. Cook the Chicken: In a pot, boil the chicken breasts in salted water until cooked through, about 15-20 minutes. Remove, cool, and shred into bite-sized pieces.
2. Sauté the Vegetables: In a large skillet, melt butter over medium heat. Add the diced carrots and celery and sauté until softened, about 5-7 minutes.
3. Make the Sauce: Stir in the flour, mixing well. Gradually add the chicken broth and milk, stirring constantly until the mixture thickens.
4. Season: Add onion powder, garlic powder, dried thyme, and season with salt and pepper. Mix in the shredded chicken and frozen peas until well combined.
5. Prepare the Crust: Preheat your oven to 425°F (220°C). Roll out one pie crust and fit it into a 9-inch pie plate.
6. Fill the Pie: Pour the chicken mixture into the pie crust, spreading it evenly.
7. Top with Crust: Place the second pie crust over the filling. Seal the edges by crimping with a fork or your fingers. Cut slits in the top crust for steam to escape.
8. Egg Wash: Brush the top crust with the beaten egg for a golden finish.
9. Bake: Bake in the preheated oven for 30-40 minutes, or until the crust is golden brown and the filling is bubbling.
10. Cool and Serve: Let the pie cool for about 10 minutes before slicing and serving.

By following these steps, you will create a pot pie that is not only delicious but also visually appealing!