Ninja Foodi Sweet Potato Fries Samantha MilnerOctober 09, 2020 112 Ninja Foodi Sweet Potato Fries. Learn how to cook sweet potato fries in the Ninja Foodi. Not only are these sweet potato fries homemade, but they are crispy and delicious too. Ideal for a quick Ninja Foodi lunch or dinner.Try itSee the full directions on my site