I have to admit, I am not a natural baker by any stretch.
So, I am not afraid to simply substitute a gluten-free flour when wheat flour is required. Making your own gluten-free pastry use Dove’s Farm Plain Gluten-free Flour (or the Aldi alternative), cold butter and sugar.
375g plain gluten-free flour (e.g. Dove’s Farm), 260g butter or coconut oil, 100g sugar. Mix the pastry ingredients well, roll into a ball, cover with cling film and put into the fridge for 30 minutes. When you are ready to put these into their moulds, have plenty of gluten-free flour when handling the dough as it tends to be a bit more sticky and crumbly than regular pastry. Try to avoid over-handling. Fill the pie form with the thinly rolled dough, shop bought mince meat and cover with another layer of thinly rolled pastry. Bake in the oven at 180C for 15-20 minutes.
Note: if you want to make this dairy-free, simply substitute Biona Mild Coconut Oil for butter, a flavourless coconut oil.