Steps Steps Set oven to 400F. Wash the candy potatoes beneath chilly water to take away any grime. Pierce the potatoes with a fork or sharp knife to create a couple of holes and minimize the ends off the candy potato. Place the candy potatoes on a baking sheet. Minimize the ends off the tip of a plantain, and utilizing a pointy knife, slice the pores and skin down the center (length-wise) to be able to peel the plantain. Place the plantains on the identical baking sheet with the candy potatoes and place within the oven. Bake the plantains for about 25-Half-hour after which take away from the oven. Enable the candy potatoes to proceed to cook dinner for about 45 minutes or 1 hour, till they’re gentle, then take away from the oven. Enable the candy potatoes to chill barely earlier than dealing with after which peel the pores and skin off.