01 - Soak the cut potatoes in cold water for at least 30 minutes to remove excess starch. Drain and pat thoroughly dry with clean kitchen towels.
02 - Preheat the air fryer to 400°F for 3 minutes.
03 - In a large bowl, toss the dried potato sticks with olive oil, 1 teaspoon fine sea salt, and optional seasonings if using, until evenly coated.
04 - Arrange the fries in the air fryer basket in a single layer without crowding. Cook in batches if necessary.
05 - Air fry for 15–20 minutes, shaking the basket every 5 minutes, until fries are crisp and golden brown.
06 - Immediately sprinkle with flaky sea salt and serve hot.