Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring it is fully submerged. Let it marinate in the refrigerator for at least 30 minutes.
In a small bowl, whisk together the almond flour, garlic powder, onion powder, sea salt, and black pepper to create the breading mixture.
Remove the chicken from the buttermilk, letting the excess drip off, then dredge it thoroughly through the almond flour mixture until evenly coated.
Preheat your air fryer to 375°F (190°C). Lightly coat the air fryer basket with half of the avocado oil.
Place the breaded chicken in the basket and drizzle or spray the remaining avocado oil over the top to help it crisp up.
Air fry for 12-15 minutes, flipping halfway through, until the internal temperature reaches 165°F and the exterior is golden brown.
While the chicken cooks, whisk together the Dijon mustard and raw honey in a small ramekin to create the glaze.
Steam the broccoli florets for 5 minutes until tender-crisp and bright green.
Once the chicken is done, brush the honey-mustard glaze over the top while it is still hot and serve immediately with the steamed broccoli.