Preheat the oven: Begin by preheating your oven to 375°F (190°C).
Mix the filling: In a large mixing bowl, combine the shredded turkey, cream of mushroom soup, frozen mixed vegetables, milk, onion powder, garlic powder, thyme, salt, and pepper. Mix until well combined.
Prepare the crust: Take your pre-made pie crust and fit it into a pie dish with a slight overhang.
Fill the crust: Pour the turkey mixture into the pie crust, spreading it evenly.
Bake the pie: Place the pie in the preheated oven and bake for 30-35 minutes or until the crust is golden brown and the filling is bubbling.
Cool and serve: Allow the pie to cool for about 5 minutes before slicing. Serve warm and enjoy!