Preheat oven to 400 degrees
Mix together chicken, vegetables, soup, onion, salt, pepper, steak seasoning and garlic powder until well combined
Pour mixture into one of the pie crust shells
Place the other pie crust shell bottom side up on top of the mixture
Use a fork to press the sides of the crust together to seal the pie
Use the fork again to gently poke several sets of holes in the top crust
Bake 30-40 minutes or until the crust is golden brown and the filling is bubbly
Let rest for about 10 minutes