Firstly, you will need to mix all the dry ingredients into a bowl. This includes black pepper, white pepper, smoked sweet paprika, salt, cumin, cinnamon, garlic powder, onion powder, and oregano.
After mixing, add the tomato puree, soy sauce and avocado oil then mix again.
Pour the spice mix over the chicken, making sure all the pieces are well coated.
Place the halved onion flat on a large chopping board, then thread the skewers through each end of the onion.
Thread the chicken onto the skewer, with the onion at the bottom.
Place the Shawarma into the air fryer and set the temperature to 365 F for 30-35 minutes, turning halfway.
Make sure you check the internal temperature of the chicken to ensure that it has reached 165 F.
Remove the skewer from the fryer and let it cool for a few minutes before slicing.
Serve the chicken shawarma in a wrap with your favorite veggies and hummus.