potato, this will give you lots of ribbons of sweet potato.
oil the baking tray with olive oil and place the ribbons of potato on the baking tray, sprinkle with a little salt and get an adult to put the baking tray into the oven and put the timer on for 10 minutes.
get an adult to check on the ribbons and turn them over, once they start to go gold brown at the edges they are cooked. get an adult to remove them from the oven and tip them onto kitchen roll to cool. they won't be totally crisp but are tasty. once cooled you can pack them into your lunch 