Preheat the oven to 200C/180C Fan/Gas 6 and place a large baking tray upside-down on a shelf.
To make the dough, sift the flour and baking powder into a large bowl.
Add the salt and a pinch of pepper, then stir in the oil.
Make a well in the centre, then stir in the warm water and mix to a soft dough, drawing the flour in from the side of the bowl a little at a time – you might need to add another 25ml/1fl oz water if the dough is a little dry; you want it to be slightly sticky and soft.
Tip the dough onto a lightly floured work surface and knead for 2 minutes, until smooth and springy.
When you are ready to prep your pizza, place the dough on a sheet of greaseproof paper.
Roll this dough until about 5 mm thick. and place on a heated baking tray in a 200C oven for about 3 minutes.
Remove and cover with passatta, toppings and cheese etc and return to the oven for a further 12 - 15 minutes until cheese is bubbling and crust os cooked.