Preheat the oven to 180C/356F. Place one oven rack near the bottom of the oven and one right at the top. This top rack will house a piece of foil to stop the pastry from over baking.
Take the block of pastry and place it on a liberally floured sheet of baking paper. I use tapioca flour. It should be soft enough to feel slightly malleable, but firm enough that there is no melting butter.
Gently roll the dough out with a rolling pin, stopping every couple of rolls to flour both sides of the dough. ‘Turn’ the dough regularly (pick it up and flip it over) to prevent it from sticking. If at any point the dough becomes soft and difficult to work with, place it flat in the fridge or freezer for a few minutes.
Once you have rolled it out to a couple of sizes larger than the pie plate, invert the pie plate gently in the centre of the pastry dough in whatever position maximises pastry overhang.
Use one hand to pull a corner of the baking paper towards you, and slide the other underneath the baking paper directly in the centre of the pie dish. Flip the dish, letting the pastry fall into it.
Don’t stretch the pastry into the dish – be generous with letting it fall into the dish. Patch up any tears as necessary, and then trim any overhang, redistributing it to places that may have none.
Once you’re happy with how the pie dough is sitting, fold the top of the pastry over themselves (outwards towards the pie dish) to create a smooth pie edge. This will create a flat and even pie edge, which is helpful when you’re putting the pastry lid on. It also just looks neater. Use your fingers to crimp the pastry edge (there’s a link to a YouTube video on how to do this in the notes).
Scrunch up a piece of large baking paper and place it into the pie dish. Ideally, some paper will hang over the edges – this will protect them from over browning during the blind baking time.
Gently fill the pie with your pie weights. I really recommend using enough weights to go right up the edges of the pastry – this pastry easily buckles in. I use dried chickpeas and rice for my pie weights and they go right up to the edge of the pie dish.
Place a large piece of foil flat on the top rack of the oven, then place the pie in the oven on the bottom rack. Bake for 30 minutes. Take the pie out of the oven and very gently remove the pie weights and baking paper, noting that they will be extremely hot (don’t put them in something ceramic, and don’t handle the bowl while they cool).
Gently brush the pie crust (sides, base and top) with milk or egg wash and return to the oven for 10 minutes.
If you want to use the leftover pastry to decorate the pie, roll and slice the pieces while you wait for the base to bake.