Preheat the oven to 400 degrees F.
Peel sweet potatoes and peel. Slice the potatoes into fourth then slice not too thick or too thin. Be careful when cutting because it is not easy to cut as the other potato.
Add cornstarch and mix evenly.
Tip: Use a paper bag or a ziplock for the mixing process.
Pour the sliced sweet potatoes in the bag into a bowl or in the same bag mix the seasoning an mix thoroughly.
Sorry, I forgot to take a picture of this step.
Add oil the to the potatoes and let it coat all thoroughly.
Line the baking sheet with a foil and spray with oil, place the potatoes on the baking sheet space the fries so they don't steam, you want them baked.
Bake for 20 minutes (put an eye on them so they don't burn. Flip and bake for about 10 more minutes, depending on how crispy you want them.
Serve with your favorite condiments. Enjoy.