Preheat the air fryer to 160°C.
In a small saucepan, gently heat the oil, honey and vanilla essence until loosened and pourable. Do not boil.
In a small bowl, whisk the egg whites with a hand-held electric mixer until white and fluffy.
In a large bowl, combine the oats, chopped nuts, seeds, desiccated coconut, cinnamon and salt.
Pour the warm honey mixture over the dry ingredients and mix thoroughly until everything is well coated.
Add the whisked egg whites and gently fold through, ensuring the mixture is evenly coated.
Line the air fryer drawer with baking paper.
Spread the granola mixture in an even, not-too-thick layer on top of the baking paper.
Air fry at 160°C for 8 minutes.
Increase the temperature to 180°C and air fry for a further 2 minutes, until golden and crunchy.
Carefully lift the granola out using the baking paper and transfer to a cooling rack.
Leave the granola to cool completely before stirring — this is essential for keeping the clusters.
Once fully cooled, break into clusters using your fingers and transfer to an airtight container.