Place the chicken breast strips in a bowl and pour the buttermilk over them, letting them soak for at least 15 minutes to tenderize.
In a shallow dish, whisk together the almond flour, arrowroot starch, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove each piece of chicken from the buttermilk, letting the excess liquid drip off, and dredge thoroughly in the flour mixture until fully coated.
Lightly coat the breaded chicken with avocado oil using a kitchen mister or brush to ensure a golden finish.
Place the chicken in an air fryer basket at 400°F and cook for 12-15 minutes, flipping halfway through, until the coating is golden and crisp.
While the chicken cooks, steam the green beans until they are tender-crisp and serve them immediately alongside the hot chicken strips.