Preheat oven to 425ºF.
Clean and scrub potatoes well. Do not peel. Cut thin piece off one side of your potato, making a flat side for safest cutting. Lay sweet potato on flat side.
Cut potato in half. Lay potato halves on flat side and cut into halves one more time. If your potato is larger than suggested or is extra wide, cut into thirds.
In a large mixing bowl, whisk together oil, salt, and optional garlic, hearty herbs, and/or spices. Add potatoes to bowl, and using a spatula or clean hands, toss to evenly coat with oil mixture.
Spread potatoes on a baking sheet in a single layer, flat side down. Roast 20-25 minutes or until potatoes begin to brown and are easily pierced with a fork. Sprinkle with optional parmesan cheese and/or chopped fresh herbs. Enjoy!