In a large bowl, combine the chicken, tamari, sesame oil, five-spice, chili powder, erythritol, sea salt, coconut flour, and almond flour. Mix well to evenly coat the chicken in seasonings.
Add the chicken to the air fryer in a flat even layer.
Set it to 180°C/ 360°F for 15 minutes.
Turn the chicken and then air fry again at 200°/400°F for 15 minutes or until crisp.
In a large pan over medium heat, fry the onion, bell pepper, and garlic, stirring often.
Add the five-spice, sea salt, pepper, and soy sauce, and mix everything well to combine.
Add the cooked chicken to the pan and let it cook with the veggies for 5 minutes.