Preheat the oven to 400°F. Line baking sheets with foil and coat with cooking spray or oil
Using a sharp knife cut both ends off the plantain. This will make it easy to grab the skin of the plantains. Slit a shallow line down the long seam of the plantain, peel only as deep as the peel. Remove plantain peel by pulling back.
Place plantains on tray and lightly spray, bake for a about 15, turn and bake on the other side for another 15 minutes or until golden brown and tender.