A bit of a tangent, but I came across a great tip a couple of weeks ago, and don't know what I didn't think of it sooner.
When you use pastry save the trimmings, cut into diamond shapes about an inch across, and freeze them in a single layer then decant into bags (separating sweet, savoury and puff into different bags). If you want an instant pie, you put the filling in the dish (eg frozen fruit with a bit of lemon juice and flour to thicken) and scatter the party bits on top. Bake it and Voila! A fancy-looking pie or pudding. You don't even need to defrost anything first, and can choose to line the base if you have fresh pastry, or use a deeper dish and leave it out to make more of a pudding.
I saw it in the Hairy Bikers Pie book, which I was flicking through the other day. They showed a fruit pie, but I think the same principle would work on a savoury one that didn't need to be too 'contained' by the pastry.