Make crispy and delicious sweet potato fries in the Ninja Foodi Air Fryer. Cut the sweet potatoes into thin strips, toss them with a little oil, salt, and any desired seasonings, and then air fry until they are crispy on the outside and tender on the inside. The air fryer gives the sweet potato fries a satisfying crunch while reducing the amount of oil used compared to traditional deep frying. Serve them as a healthier alternative to regular fries.