Preheat oven to 425℉ and spray a 9x13-inch baking dish with non-stick spray.
In a pot over medium-high heat, add the butter, onions, carrots, and celery, and cook for 4-5 minutes, until tender.
Sprinkle the flour over the veggies and cook for another 1-2 minutes.
Slowly whisk in the chicken broth and cream, and cook for 1-2 minutes until it starts to thicken.
Add in the chicken, peas, paprika, garlic powder, thyme, salt, and pepper, and cook for another 1-2 minutes.
Pour the mixture into the prepared baking dish.
In a medium bowl, stir together the biscuit mix, cold water, and cheese.
Spread the mixture over the pot pie mixture and bake for 16-18 minutes.
In a small microwaveable bowl, melt the butter and then add the garlic herb seasoning mix.
Pull the pot pie out of the oven and brush the top with the butter and herb mixture. Let it sit for 5-10 minutes.
Serve and enjoy!