Wash and cut your sweet potatoes into strips. You can peel them, but I chose to leave the skins on. Also, the skinnier you cut your sweet potatoes, the crispier your fries will end up being.
Place sweet potatoes in a zip-top bag. Add oil and spices. Shake, shake, shake until sweet potatoes are even coated.
Place fries on a baking sheet. Bake for 25-30 minutes or until crisp, flipping halfway through.
Make the dipping sauce:
Combine in a bowl. Season with salt and pepper to taste. Serve alongside sweet potato fries.
Notes
Find tahini in the international foods aisle of your grocery store, usually with the Middle Eastern foods.