01 - Preheat your oven to 425°F. Line two large baking sheets with parchment paper to prevent sticking and ensure easy cleanup.
02 - Carefully slice the peeled sweet potatoes lengthwise into thin, uniform matchsticks, approximately 1/4 inch thick. Consistency in size is key for even cooking and crispness.
03 - Place the cut sweet potato matchsticks into a large mixing bowl. Sprinkle the cornstarch over them and toss thoroughly until every piece is lightly and evenly coated. Gently shake off any visible excess cornstarch.
04 - Add the olive oil, smoked paprika, garlic powder, 1/2 teaspoon sea salt, and 1/4 teaspoon black pepper to the bowl with the cornstarch-coated sweet potatoes. Toss vigorously until all the fries are uniformly coated with the seasoning mixture.
05 - Distribute the seasoned sweet potato fries in a single layer across the prepared baking sheets. It is crucial that the fries do not touch or overlap to allow proper air circulation and achieve maximum crispiness. Use both baking sheets if necessary to avoid overcrowding.
06 - Bake for 12 minutes. After this initial baking period, carefully remove the baking sheets from the oven and use a spatula to meticulously flip each individual fry. Rotate the baking sheets between oven racks to promote even browning.
07 - Return the baking sheets to the oven and continue baking for an additional 10 to 13 minutes, or until the sweet potato fries are delightfully crisp and exhibit golden-brown edges. Monitor them closely to prevent overcooking.
08 - Once perfectly crispy, remove the sweet potato fries from the oven. If desired, sprinkle with additional sea salt to enhance their flavor. Serve immediately while hot, optionally garnished with fresh chopped parsley for an aromatic finish.