Four cheese pizza with cauliflower crust

Crust (cauliflower, corn starch, brown rice flour, white rice flour, tapioca starch, sunflower oil, xanthan gum, yeast, sugar, egg yolk powder, olive oil, sea salt, baking powder (sodium acid pyrophosphate, sodium bicarbonate, corn starch, monocalcium phosphate), red wine vinegar), tomatoes in puree, mozzarella cheese (part skim milk, cheese cultures, salt, enzymes), parmesan cheese (milk, cultures, salt, enzymes), white cheddar cheese (milk, cultures, salt, enzymes), provolone cheese (milk, cheese cultures, salt, enzymes), sea salt, oregano.