Make the Pesto: 

1. To a food processor add basil, pecans, garlic, salt, pepper, and lemon zest. Blend until basil is roughly chopped up.
2. Slowly add the olive oil till smooth.
3. Once completely blended, pour mixture into a bowl and stir in the parmesan cheese.
4. Set aside.

For the Salmon:

1. Heat air fryer to 400°F and let preheat for 2-3 minutes.
2. Pat salmon dry with a paper towel.
3. Brush avocado oil on flesh side of salmon, season with salt and pepper.
4. Using tongs, gently place salmon skin side down in air fryer basket and air fry for 9-10 minutes (depending on the thickness of your salmon)
5. Check for desired doneness. The best way to do this is to gently flake the salmon with a fork.
6. Remove from air fryer and top with pesto.