Peel the yams
Cut into even fry-shaped sticks
Soak in cold water for 30 minutes
Drain and dry completely
Toss with oil, salt, and cornstarch
Add paprika, garlic powder, or black pepper if desired
Preheat oven to 425°F
Line a baking sheet with parchment paper
Spread fries in a single layer without crowding
Bake for 20 to 30 minutes, flipping halfway through
Broil for 1 to 3 minutes for extra crispness
Serve immediately