Preheat your oven to 350°F/175°C.
Line two large baking sheets with baking parchment.
Add all dry ingredients to a mixing bowl and briefly stir to combine.
Add the water ½ a cup at a time, mixing it in really thoroughly each time so as to avoid getting lumps.
When all the water is added, leave the mixture to one side for 10 minutes to thicken.
Divide the mixture between the baking sheets (it will be runny) and use a spoon to ensure it is evenly spread in a layer (about 5mm thickness is what you're after).
Bake for 13-15 minutes in the oven, until the bases are no longer liquid and are lightly browned.
Spread a layer of tomato sauce over each pizza base, and scatter over the cheese.
Top the pizza with the vegetables and place back in the oven to bake for another 10-12 minutes.
Remove the pizzas and scatter with basil leaves before serving. Enjoy!