Sweet potato, feta and pine nut pie

This pie is one of my 'I have some odds and ends that need using up so I'll just try make something up' recipes. The filling definitely has a wow factor (for me) and all the flavours really worked well together. I'm not entirely convinced as to the pastry - as you may be able to tell from the photos, I did not make enough so the 'lid' was not entirely closed! I've estimated how much would be better and changed the amounts here. In fact, I think it would be better - instead of having a full enclosed pie - to just add the filling straight to the dish, and top with a store bought puff pastry 'lid'. This would also make things easier.