Preheat the oven to 250°C / 480°F.
Prepare your pizza toppings base layers - don't add the cheese yet!
For Margherita: Layer crushed tomatoes or passata and spread around the base and drizzle with olive oil.
tomatoes, pinch salt and pepper
For Zucchini & Prosciutto: Layer with grated zucchini and drizzle olive oil over the top.
olive oil, 2 zucchini, pinch salt and pepper
For Potato & Rosemary: Drizzle with olive oil and spread out over the base. Line with thin slices of potato, rosemary and a good sprinkling of salt and pepper.
olive oil, 3 potatoes, 1 tsp rosemary, pinch salt and pepper
Place in the oven and cook for 10 minutes or so until first topping layer has cooked through nicely. The dough should be just starting to brown at this stage.
Take out of the oven and sprinkle with parmesan cheese and small chunks of mozzarella over all pizzas. Add the prosciutto to the zucchini pizza(s).
parmesan cheese, mozzarella, 2 slices prosciutto
Place back in the oven and cook for another 5-10 minutes or so until the cheese has melted and the base has become nice and crispy.