Put the flour, yeast, 1 tbsp oil, 300ml lukewarm water and a big pinch of salt in a bowl and mix to a soft, wettish dough. Knead in a mixer or by hand, lifting the dough as you work it to keep it light, until the dough is smooth – about 10 minutes. try not to add any more flour – it will get less wet as you work it, but should still be very soft when you finish kneading. Put in a bowl, cover and leave to rise for 2 hours. Heat the oven as hot as it will go. Put a pizza stone or heavy baking sheet in the oven.