Start off by preheating your oven to 130 degrees Celsius. Remove the thick stalks from the kale leaves and then tear them up into large pieces - about 5cm across.

Place the kale pieces in a colander and wash them thoroughly and then shake off any water.

Arrange the kale across two large baking sheets. Sprinkle the oil and salt over both sheets and massage it into the kale.

Place the baking sheets into the oven and bake for about 20 minutes, gently turning the kale every 5 minutes or so.

Remove the chips when they have just turned crisp, before they brown too much, and enjoy.