Weigh the 2 flours, ground almonds, directly into a good-sized bowl – zeroing the scale each time. Add the salt and mix well.
Add the chilled, vegan block butter - cut into smallish cubes.
use a pair of large table knives (one in each hand like scissors) to cut the fat into the flour to get it going. When it’s in very small pieces, you can finish off by rubbing it in using just your fingertips. you’re looking for the mixture to resemble fine breadcrumbs with no lumps of butter remaining.
Add the cold water (or spirit if using).
Mix with a pallet knife to combine. It should come together into a ball fairly easily – it may need just a little more water, but it’s best to avoid this if you can.
Form the pastry into an approx 15cm disc – but don't knead it. Place on a piece of grease-proof paper, and cover with a suitably sized bowl. Then refrigerate for about 45 minutes until cool & firm enough to roll out. Don’t leave it too long though or it will become too hard.
Roll the pastry out on a lightly floured cool surface until you have a circle 3cm bigger than the base of a 25cm fluted round tart tin. A loose base tin is best.
If you have a loose base, remove the base, grease it and place a same sized parchment paper circle on it. Place it in the centre & on top of the pastry, and then cut round it.
Carefully remove the edge pieces
Free the pastry from the surface using the pallet knife and some flour - so you can slide the base under the pastry circle. This is the most fool proof way.
Position the pastry so it perfectly covers the base, then return it to the tart casing.
Take the edge pieces and run them round the edge - so they join the pastry base – they will be more than long enough. Press the pastry into the flutes/corners then cut off the top with the pallet knife.
If you can’t do it this way because you don't have a loose base tart case, you’ll have to attempt to get the pastry into the tin without it breaking or getting mangled – that is a very tricky way to do it though - especially with wholemeal pastry.
Prick the base of the pastry all over with a dining fork then place it in the freezer for 10 to 15 minutes until nicely firm. Meanwhile preheat the oven to 180°C/160°C fan.
Line the pastry case with a baking parchment circle.
Then fill sufficiently with ceramic baking beans to keep the sides in place.
Bake for 10 minutes then remove the paper and baking beans and return the pastry case to the oven for a further 10 minutes until pale golden. Remove from the oven and set to one side.