Preheat the oven to 130C/250F/Gas Mark ½.
Prepare large, shallow baking tray and line it with baking paper.
Remove kale leaves from the stems, tear them into smaller pieces, wash and dry them thoroughly.
Put dried kale leaves in a large bowl and sprinkle over 1 tablespoon of rapeseed or olive oil. If you’ve got your oil in a handy spray bottle, simply squirt it few times over the leaves and massage in patiently until it has been evenly distributed.
Transfer kale pieces onto prepared baking tray, sprinkle over seasoning of choice (I’ve used Za’atar here) and put into the preheated oven for 10 minutes.
Once the time is up, take the tray out of the oven and move your kale pieces around with spatula or even your hand to ensure they bake evenly and pop back in the oven for another 5-8 minutes or so but make sure you keep an eye on them. You might have to give your kale another shuffle around 5-8 minute mark and pop back in the oven for extra couple of minutes.
Once baked, let your crisps sit on the baking tray for 5 minutes to cool slightly. This will let them crisp up that bit more.
Adjust seasoning if required, sprinkle over some salt and enjoy!