Preheat the oven to 415°F and coat a baking pan with canola oil. Peel and slice the plantains, not too thin and not too thick. Lay the slices over the baking pan and sprinkle with cinnamon, cane sugar and lime peel. Roast for 10–15 minutes, then flip. Continue to roast until the plantains are golden brown, about 10–15 minutes.