Place the chicken breast in a bowl and cover with buttermilk; marinate for at least 20 minutes to tenderize.
In a separate shallow dish, combine almond flour, garlic powder, onion powder, sea salt, and black pepper.
Remove chicken from buttermilk, letting excess drip off, then coat thoroughly in the seasoned almond flour.
Heat avocado oil in a large skillet over medium heat until shimmering.
Carefully place the chicken in the pan and cook for 5 to 7 minutes per side until the crust is golden brown and the internal temperature reaches 165°F.
While the chicken cooks, whisk together the Dijon mustard and raw honey in a small ramekin.
Steam the broccoli florets for 4 to 5 minutes until they reach a bright green color and tender texture.
Serve the crispy chicken immediately alongside the honey mustard sauce and steamed broccoli.