Preheat oven to 425ºF.
Clean and scrub sweet potatoes well. Do not peel. Dice into ½-¾" cubes.
In a large mixing bowl, combine oil, salt, and optional garlic, hearty herbs, and/or spices. Add diced sweet potato. Using a spatula, toss to evenly coat.
Spread sweet potatoes on a baking sheet in a single layer. Do not overcrowd the pan.
Roast 25-30 minutes or until potatoes are browned, crisp, and easily pierced with a fork. Sprinkle with optional parmesan and/or chopped herbs. Enjoy!