Sweet PotatoAn easy baked Okinawan sweet potato. Ingredients1 Okinawan sweet potato1 Okinawan sweet potatoInstructionsPreheat the oven to 400°F.Preheat the oven to 400°F.Cut the sweet potato into 1-inch slices.Cut the sweet potato into 1-inch slices.Wrap the slices in foil.Wrap the slices in foil.Bake for 30 to 40 minutes.Bake for 30 to 40 minutes.