Preheat your air fryer to 400°F and dice the sweet potato into half-inch cubes.
Place the chicken breast in a small bowl with the buttermilk and let it soak for 10 minutes to tenderize the meat.
In a shallow dish, whisk together the almond flour, arrowroot powder, garlic powder, onion powder, sea salt, black pepper, and paprika.
Remove the chicken from the buttermilk, letting any excess drip off, then dredge it through the flour mixture until fully and evenly coated.
Lightly brush or spray the coated chicken with half of the avocado oil to ensure a golden finish.
Toss the sweet potato cubes with the remaining avocado oil and a pinch of salt.
Place the chicken and sweet potatoes in the air fryer basket in a single layer, cooking for 12-15 minutes until the chicken is crispy and reaches an internal temperature of 165°F.
While the chicken is air-frying, steam the green beans for 5-6 minutes until they are bright green and tender-crisp.
Plate the crispy chicken with the roasted sweet potatoes and steamed green beans for a complete, clean-eating meal.