1Preheat the oven to 200°C (400°F) Fan. Cut the onions horizontally and place them on a tray lined with baking paper, cut side down.

2Place at the bottom of the oven and roast for 40 minutes or until completely cooked through and very soft.

3In the meantime, add half of the frozen cauliflower to a mini food processor. Take it directly from the freezer.

4Grind into cauliflower ice. Repeat with the rest of the cauliflower. It’s easier to do it in batches.

5Transfer ground cauliflower to a small mixing bowl.

6Add milk, rice flour, onion powder, garlic powder and salt.

7Mix to combine.

8Transfer onto a baking tray double lined with baking paper.

9Spread out into a large thin rectangle using a spoon or your hands.

10Bake in the middle of the oven for 20 minutes.

11Lift the top baking sheet the pizza crust is resting on top and flip it over. Bake for another 5 minutes. This will allow the bottom of the crust to dry out and it'll be easier to peel off the top sheet.

12Lift the skin off the onions or scoop out the flesh with a spoon. Chop it into strips.

13Carefully peel off the top sheet off the crust.

14Top the pizza crust with onions.

15Top with cheese.

Tip: you can make your own cheese in under 2 minutes using this method.

16Sprinkle with ground black pepper for taste. Bake in the middle of the oven for another 5 minutes.

17Slice it up and transfer to a serving plate.