Peel the sweet potatoes and slice it into 1/2 inch sticks.

Submerge the sweet potato into a bowl of cold water for 10 mins.

Drain the water from the sweet potatoes and pat it dry with paper kitchen towels.

Brush Air-fry basket with vegetable oil and lay flat the sliced sweet potatoes.

Pre-heat Breville Smart Oven Air Fryer. Brush the sweet potatoes with vegetable oil.

Air-fry the sweet potatoes for 20 -25 mins under 200 Deg C.

For the brown sugar sauce: In a pan combine brown sugar and 2 tablespoon of water and let it simmer until the sugar caramelize.

Add soju and butter and let it cook fo another 2 mins. Once it thickens, turn off the stove and transfe into a bowl.

Once the sweet potatoes are cooked and crisp, place it into the bowl of bown sugar sauce and toss to coat.