Preheat oven to 130c

Line 2 baking tray with baking paper and brush with oil

Cut the banana into even slices, about 5MM

Toss in a bowl with the lemon juice to coat, drain off excess juice

Put on baking tray in a single layer, sprinkle with cinnamon, bake for 1 hour 40 min turning half way through

Serve, sprinkled with salt.