Me Oh My, I Love Pie! .... Speedy Chicken Pie

The simple things in life are the best and you know what? I think they are right, because this chicken pie is one of those simple classics that just warms the cockles of your heart, especially on a blowy, wet October day.
If you have chicken that is already cooked, and a store bought, pre-rolled sheet of puff pastry, then so much the better as this speeds things along, and speed is the name of the game for this dish!