Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper or a silicone baking mat. Lightly spray with nonstick cooking spray if desired. This helps prevent sticking and promotes crisp edges.
Scrub the white sweet potatoes under cool running water and pat them very dry with a clean towel. Slice each potato in half lengthwise, then cut each half into 4–6 long wedges, about the size of thick fries. Try to keep the wedges similar in thickness so they roast evenly.
Place the wedges in a large mixing bowl. If using, sprinkle the cornstarch or arrowroot over the potatoes and toss to lightly coat. Add the olive oil, minced garlic, kosher salt, black pepper, dried Italian seasoning, and smoked paprika. Toss with your hands or a large spoon until every wedge is evenly coated; add a small drizzle of extra oil if any pieces look dry.
2 pounds white sweet potatoes, 3 tablespoons extra-virgin olive oil, 3 cloves garlic, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, 1 teaspoon dried Italian seasoning, 1/2 teaspoon smoked paprika, 1 teaspoon cornstarch or arrowroot starch
Spread the seasoned white sweet potato wedges in a single layer on the prepared baking sheet. Make sure they have a bit of space between them; if the pan looks crowded, divide the wedges between two baking sheets to avoid steaming instead of roasting.
Roast the potatoes for 15–20 minutes. Remove the baking sheet from the oven and flip each wedge with tongs or a spatula. Return to the oven and roast for another 10–15 minutes, or until the wedges are deep golden in spots and tender inside when pierced with a fork. If they are not browning well, increase the oven temperature to 435°F (224°C) for the last 5 minutes.
Transfer the hot roasted white sweet potato wedges to a serving dish. Immediately sprinkle with the chopped fresh parsley and, if using, the grated Parmesan cheese. Toss gently and taste; add a pinch more salt and pepper if needed to brighten the flavors.
1 tablespoon fresh parsley, 1 tablespoon Parmesan cheese
Serve the garlic herb white sweet potato wedges hot as a side dish with your favorite protein, or enjoy them on their own with a dipping sauce such as plain Greek yogurt mixed with lemon juice and garlic. They are best right out of the oven when the edges are at their crispiest.