01 - 
                Slice potatoes into strips 1/4 to 1/2 inch thick, then drop them in icy water for at least 1 hour or up to a full day.
              
              
              
                02 - 
                Warm up the air fryer to 390°F. Give it about 15 minutes to heat up properly.
              
              
              
                03 - 
                Pat the potato sticks dry, then mix them in a bowl with oil, rosemary, salt, and pepper until fully coated.
              
              
              
                04 - 
                Lay the potatoes in the fryer basket, cook for 10 minutes, and give them a toss halfway through for even cooking.
              
              
              
                05 - 
                Keep frying for another 10-12 minutes until they’re golden and crunchy. Check and remove any pieces that look overly dark as you go.
              
              
              
                06 - 
                Let them sit for a few minutes to crisp up a little more. Add extra salt to your liking before serving.