Wash, peel, and chop vegetables as desired. boil or steam all vegetables except onion.
Sauteé onion in butter until translucent. Mix in cornstarch, and quickly add chicken broth and milk. Stir until thickened.
Drain veggies, and add to the onion mix. Add chicken and spices to taste.
Roll out pie crust as directed, and line a deep casserole dish (appoximately 1.5 quart capacity). Pour filling in, and top with another layer of pie crust.
Cut vents into the top crust.
Bake at 350º for thirty minutes or until the crust is nicely browned.
Take out of the oven and serve. Be careful – the filling is hot!