Preheat the oven to 200°C
Wash and peel the kumara
Slice the kumara into thin, even chips
Pat the slices dry with a paper towel
Place the slices in a bowl
Add oil and salt
Toss until evenly coated
Arrange the slices in a single layer on a baking tray
Bake for 20 to 30 minutes
Flip halfway through cooking
Remove when golden and crisp
Serve immediately