1In a bowl, mix pecan halves with egg white, water, and vanilla until well coated. Let sit for 1-2 minutes.
2Meanwhile, combine sugar, cinnamon, and salt in a small bowl and mix well.
3Gradually sprinkle the sugar mixture over the pecans, stirring after each addition, until evenly coated.
4Spray the air fryer basket with grapeseed oil or line with parchment paper.
5Place the pecans in a single layer in the basket and cook in the air fryer at 160°C (320°F) for 8-10 minutes, until golden and crispy.
6Repeat with remaining pecans – in the Ninja Foodi air fryer, they fit in 3 batches.