Combine all ingredients in a large bowl and toss thoroughly to coat the potatoes evenly.
Place the seasoned potatoes into the air fryer basket. Set the air fryer to 400°F and cook for 30 minutes. At the halfway mark, pause the cooking, open the basket, and shake it well to ensure even cooking. Return the basket to the air fryer and continue cooking.
Once the cooking is complete, sprinkle additional rosemary and salt over the potatoes before serving. To prevent steaming, make sure to open the air fryer drawer promptly after cooking. Enjoy your crispy, flavorful potatoes!