Preheat oven to 425
In a small bowl, combine the thyme, rosemary, salt, onion powder, garlic powder, ground sage, and ground black pepper. Set aside.
In a large skillet, melt the butter over medium high heat. Add the potato and the herb mixture and let cook for about 5-7 minutes until they start to get translucent
Sprinkle in the flour and cook for another minute or two while stirring until the flour is no longer visible
Stir in the chicken broth and 1/2 cup of the cream, then cook, stirring often, for 3 minutes or until thickened
Stir in the chicken (or turkey/ham), frozen peas and carrots, parsley and remaining 1/2 cup cream, cook for another 2-3 mins, then remove from heat and set aside
Line a 10 inch pie pan with one of the crusts. Prick the bottom with a fork
Add the filling to the crust. Cover with the other crust, seal and crimp the edges and cut four slits in the pie, near the center
Brush the pie crust all over with the beaten egg. Place the pie pan on a metal baking sheet (to help distribute heat)
Bake at 425 on the bottom rack of the oven for about 30-35 minutes or until golden brown
Remove from the oven and let sit for 10 minutes or so before serving!