Line two baking sheets with aluminum foil or silicone sheets and lightly spray with non-stick coconut cooking spray. Place them in the oven to heat up.
As the oven is heating, scrub your sweet potatoes clean and then chop them into 1/2" sticks or evenly-sized wedges.
Add them to a bowl and toss with salt and pepper and any additional seasoning. This is when you would also add olive oil if you wish to use it. I just use a little of the cooking spray here instead.
Spread the "chips" onto the baking sheets leaving a little room between each one so that they can brown.
Cook for roughly 20-25 minutes turning once. Cook until the edges are brown and centers are tender.
Notes
Tip: Add a small pinch of cornflour to your chips as you toss them with salt and pepper. Apparently this helps to make them a little more crispy!
If you like your fries with a bit of a kick, add a pinch of cayenne and cumin or if you're more of a sweet tooth wrinkle with cinnamon!