Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
Scrub the sweet potatoes well (no need to peel) and cut them into 1-inch cubes for even roasting.
In a mixing bowl, toss the sweet potato cubes with olive oil, salt, pepper, and maple syrup (if using) until evenly coated.
Spread the sweet potatoes in a single layer on the baking sheet.
Roast for 35–40 minutes, flipping halfway, until tender and caramelized.
Enjoy warm as a side dish or snack. Optional: sprinkle with sesame seeds or a dash of cinnamon for extra flavor.