Lay the bottom crust in a deep-dish pie plate and press in lightly. Arrange the vegetables and chicken in the crust and cover with the condensed soup. (For a thinner gravy, mix a little milk or water into the soup before adding it to the pie.) Cover with the top crust and seal the edges. Cut a couple of vents in the top crust and bake as if for a two-crust pie (such as an apple pie) until golden brown and bubbly.
Note: if your top and bottom crusts aren't sealed tightly enough, the gravy may drip over the side and burn on the bottom of the oven. Put some foil or a cookie sheet underneath the pie plate to prevent this.