Preheat the oven to 180 degrees.
Mix the flour, salt and olive oil in a bowl.
Add a little water at a time while combining the mixture. Wait until a dough forms and stop adding water at this point - you don't want it too sticky or wet! If it does become like this - add a little more flour to dry out and soak up excess moisture.
Knead until soft.
Break the dough ball into 2 parts and roll flat with a rolling pin on a flour dusted surface. Roll thin!
Place the pizza bases on 2 baking trays and place in the oven for 10 mins.
Remove from the oven and add the toppings; passata, red onion, red pepper and cheese.
Place the pizzas back in the oven and bake for a further 10-15mins.
Remove from the oven, add balsamic vinegar, walnuts, avocado, pomegranate seeds and rocket leaves.