Preheat oven to 450°F. In a saucepan, heat oil over medium-high heat. Add onion stirring until tender. Stir in flour and seasoning until blended. Whisk in broth and milk. Bring to a boil, stirring constantly until thickened. Stir in chicken and vegetables
Transfer filling mix to a greased 9-inch deep-dish pie plate. Place pie crust over filling mix. Trim the edges and seal. Cut slits on top of crust then bake for 20 minutes or until crust is golden brown. Let cool and serve!
