Preheat the oven to 200 C.
Line a tray with baking paper and set aside.
Add the cauliflower florets, psyllium husks, olive oil, and salt to a food processor.
Process on high speed, until a homogeneous, sticky puree is formed.
Add the cornstarch and flour and process again to incorporate the ingredients and form a dough.
Add the cheese and pulse until just combined.
Brush the prepared baking paper with a little oil.
Form a dough ball, then roll it into a pizza circle. Transfer to the prepared baking tray.
Bake for about 7 minutes until lightly golden.
Add the marinara sauce, vegan cheese mix, grilled zucchini, sliced bell pepper, salt and pepper to taste.
Return to the oven and bake for about 7 more minutes.
Top with some chopped greens and serve!