Preheat your oven. Go for a temperature of at least 230C / 450F. The higher the temperature, the more the dough will crisp up. I've tried this at 300C / 570F and that works very well too- it goes super crispy. The ones pictured were a lower temperature, in hindsight I preferred them at 300C/570F.
Make the dough
Mix all of the ingredients in a bowl and knead for a few minutes until a robust dough has formed. Depending on how moist your starter is you may want to add some water, a teaspoon at a time.
Let rest for at least half an hour. The longer, the better.
Make the pizzas
Split dough into 4 equal portions and roll or stretch the dough out to form rectangles or circles, whichever shape you prefer.
Spread sauce or tomato puree on top, and sprinkle on the cheese.
Cook for 8-10 minutes (this will largely depend on your oven temperature so keep a close eye on them!)
Top each pizza with a few basil leaves, a few grinds of black pepper, and a drizzle of garlic oil.