Mix oil, flour, baking powder, salt and water together. Take out about a third and knead for 5 minutes. Repeat two more times, so all the dough is kneaded. If it's too stiff add more water; too sticky add more flour.
Roll out onto a pizza stone and pre-bake at 220 Celcius for ~5 minutes. Repeat for other two.
Take out of oven and spread 1/3 can of tomato paste on top, along with sliced up preferred toppings (pineapple and bacon - hawaiian; tomato and basil - margherita etc). Add grated cheese on top.
Bake off until cheese has melted and ingredients is cooked.
Note 1: you can use the sundried tomato oil instead of vegetable oil.
Note 2: broccoli stalks and zucchini can be grated into the cheese, so you don't need as much cheese.