Transfer sweet potatoes pieces to a large mixing bowl. Add oil and seasoning, and toss well until potatoes get evenly coated.
Preheat the air fryer at 400°F for 2 minutes. Spread the seasoned sweet potatoes in the fryer tray, in a single layer. You may have to cook these in 2 batches, depending on the size of your air fryer.
Air fryer for 10-12 minutes, shaking the basket half way through, about 5-6 minutes. Remove and check the sweet potatoes. For extra crispy, shake the basket and air fry for another 2 minutes.
Alternative Method: Oven
Preheat the oven to 425°F. Spread the seasoned sweet potatoes evenly on an aluminum lined baking sheet, in a single layer. Cook for 25 minutes, flipping the potatoes after 15 minutes.
Video
Notes
Use a sharp knife when cutting: A dull knife means you'll end up pressing harder to cut, which not only requires more effort, it also is more likely to slip and cut you.
Cut them the same size: This ensures even cooking. To get a consistent size, I start by making cut marks that are ½ inch apart and then cut them through.
Make them crispy: Make sure to spread the sweet potatoes in a single layer when cooking them, even if you have to make multiple batches.
Shake the basket halfway: Don't neglect to shake the basket halfway through the cook time to allow all the edges of each cube to be cooked evenly.
Serve them right away: These roasted sweet potatoes get soft as they sit and cool, I find them the best served right away!
Note: The nutrition facts below are my estimates. If you are following any diet plan, I recommend cross-checking with your preferred nutrition calculator.