01 - Wash and optionally peel the potatoes, then cut into ¼-inch thick fries.
02 - Place the cut fries in a large bowl of cold water and soak for at least 15 minutes to remove excess starch.
03 - Drain the fries and thoroughly pat them dry with a clean kitchen towel.
04 - Toss the dried fries with olive oil, 1 teaspoon sea salt, and black pepper if using, ensuring even coating.
05 - Preheat the air fryer to 375°F (190°C) for 3 minutes.
06 - Place the fries in a single layer inside the air fryer basket; cook in batches if needed to avoid overcrowding.
07 - Cook the fries for 18 to 22 minutes, shaking the basket halfway through, until golden and crispy.
08 - Transfer fries to a serving dish, sprinkle with additional sea salt and optional garnishes, then serve immediately.