Turn plantain slices every so often. Don’t burn them, but so not afraid of the very dark colour developed on the surface. You can use lover temperature to cook more deep and less dark, or higher temperature to make the surface more caramelised. Cooked as long as you like. There is no right and wrong doneness.
Remove from the pan and serve on the plate. At this stage, plantain slices will be very hot and spicy, but if you want to make them more spicy – add tiny slice of fried chilli on the top of each piece.