Place the chicken breast in a bowl and pour the buttermilk over it, letting it marinate for at least 15 minutes to tenderize.
In a shallow dish, whisk together the panko breadcrumbs, almond flour, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, letting any excess liquid drip off, then dredge thoroughly in the breadcrumb mixture until fully coated.
Lightly spray the air fryer basket with oil and place the chicken inside, cooking at 375°F for 12-15 minutes, flipping halfway through, until golden and crispy.
While the chicken cooks, toss the green beans with olive oil and a pinch of salt, then steam or sauté in a pan until tender-crisp.
Serve the crispy chicken immediately alongside the vibrant green beans for a balanced, clean-eating feast.