In a large mixing bowl, combine rolled oats, chopped nuts, cinnamon, and a pinch of salt. Stir to mix evenly.
In a separate bowl, whisk together nut butter, maple syrup (or honey), and vanilla extract until smooth and well combined.
Pour the wet ingredients over the dry mixture. Stir thoroughly to ensure all the oats and nuts are evenly coated.
Set your air fryer to 300°F (150°C) and preheat for 3-5 minutes.
Line the air fryer basket with parchment paper or a silicone liner. Spread the granola mixture in an even layer, leaving some space for air circulation.
Air fry at 300°F (150°C) for 8-10 minutes, stirring halfway through to prevent clumping and ensure even browning.
Once the granola is golden brown, remove it from the air fryer and let it cool completely. This step allows it to crisp up.
Stir in dried fruit, chocolate chips, or any additional toppings after the granola has cooled.
Transfer the cooled granola to an airtight container. It can be stored at room temperature for up to two weeks. Enjoy as a snack, breakfast topping, or with milk!