Bring a large pot of water to the boil. Leave to simmer.
Add cauliflower florets to food processor. Blitz until ground to size and texture similar to rice grains. If you don’t have a food processor, you can use a box grater.
Balance a sieve over the pot of boiled water. Add the cauliflower grains to the sieve and steam. Bring the water back to the boil if needed.
Transfer cauliflower tea towel or cheeseloth. Squeeze or press to drain out as much water as possible.
Preheat oven to 450°F (230°C)
In a large bowl, add the cauliflower rice and all other ingredients. Combine thoroughly and form a smooth ball.
Place parchment paper on a kitchen surface. Place the cauliflower rice dough on the paper and flatten with your hands. Roll it out to form a round pizza base, about ½-inch thick. Flatten and smooth it as much as possible.
Carefully transfer to a baking sheet lined with parchment paper. Add your choice of toppings (suggestions above) and bake in the preheated oven for 10 minutes, or until crust starts to brown.
Remove from oven and allow to cool for 5 minutes before slicing and serving.