Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring it is fully submerged to marinate for at least 20 minutes.
In a separate small bowl, whisk together the almond flour, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, letting any excess drip off, then dredge it thoroughly in the almond flour spice mixture until evenly coated.
Preheat your air fryer to 375°F and lightly spray the basket with a small amount of avocado oil.
Place the coated chicken in the air fryer and drizzle or spray the remaining avocado oil over the top to ensure a golden, crispy finish.
Air fry for 12-15 minutes, flipping halfway through, until the internal temperature reaches 165°F.
While the chicken cooks, steam the fresh green beans for 5-7 minutes until they are bright green and tender-crisp.
Serve the crispy chicken immediately alongside the steamed green beans for a balanced, high-protein feast.