Sweet potato fries are a popular and healthier alternative to regular fries, and they can be easily made in your Ninja air fryer. Cut the sweet potatoes into thin strips, toss them in olive oil and your favorite seasonings, then air fry them until they are crispy and golden. The air fryer ensures that the sweet potato fries cook evenly and develop a delicious crunch. Serve them as a side dish or as a tasty snack.