Heat the oven to 200ºC (180º fan) 400ºF, gas 6.
Place the pizza bases onto baking trays and spread each one with a little passata. Scatter over the mozzarella then arrange the tomatoes, olives, pepper and onion on top. Season with salt and pepper and drizzle over the oil.
Chop the herbs and sprinkle over the pizzas then bake them in the oven for 15 - 20 minutes or until the cheese is bubbling and the bases are golden brown.