Preheat oven to 400 degrees. After cutting potatoes, run them through cold water.
In a bowl, toss the sweet potatoes with the cornstarch until completely covered.
Drizzle in the olive oil then add the rest of ingredients.
Rub in seasoning and oil with your hands so fries are well covered then spread out on a cookie sheet.
Bake for 25-30 minutes, turning fries once midway through cooking.
Finish under broil for 1-2 minutes and watch closely so they do not burn.
Remove from oven and serve as a snack or side dish.