To make the pizza dough, place the flour in a large bowl and add the yeast to one side and the salt and sugar to the other. Add the olive oil then gradually stir in the water until it forms a rough dough. Turn out onto an un-floured surface and knead for about 10 minutes until smooth and elastic.
To make the tomato sauce, place the passata, tomato sauce, garlic, oregano, basil, sugar and some salt in a small pan. Simmer gently for about 10 minutes until reduced slightly. Can be made a day in advance and stored in the fridge once cool.