Medium pot on med-high heat. Add veggie stock, bring to the boil. Add the polenta. Stir continuously for 15 minutes. Reduce the heat to low, cook for another 10 minutes, stirring occasionally. Remove from the heat. Add parmesan cheese (optional) mix well. Stand for 5 minutes.

Butter the trays and line with baking paper. Once the polenta has cooled, pour half the polenta over one of the trays, spread evenly. Do the same with the other tray. Place in the fridge overnight or for 4 hours to firm up.

Remove from the fridge. Flip tray over on the bench. Peel off the baking paper. Cut polenta into your desired chip size.

In a bowl, add the cornflour. In batches, roll the chips in the cornflour (this makes them crispy). Remove and gently shake excess flour off. Cook in deep fryer or in a shallow fryer in a pot on the stove or in the oven, until golden brown and crunchy. Serve immediately.