Low cal cooking spray (or oil)
Flavouring Spices or stock cube
1. Place kale leaves flat on baking tray.
2. Spray or wipe with a small amount of oil.
3. Sprinkle flavouring spices or stock or whatever tastes good on top.
4. Place in oven at top heat for 3 minute. Then check every minute with a wooden spoon if they've gone crisp (they will very suddenly go from crisp to burnt)