particularly for mini pies and things…. bread!
you can lightly spray muffin tins and cut a slice of bread into a circle a bit bigger than the space in the tin, roll it with a rolling pin, or press it with your fingers to make it flat, then put it in the tin as you would pastry. Put in your filling, and add a top, ot potato or something… and cook as usual.
You can use something like a soy and linseed bread which gives an interesting texture and is better for you than pastry!