Slice the chicken breast into even strips to ensure uniform cooking and maximum surface area for the crust.
Place the chicken strips in a shallow bowl and pour the buttermilk over them, soaking for at least 15 minutes to tenderize the meat.
In a separate wide dish, whisk together the almond flour, arrowroot powder, garlic powder, onion powder, smoked paprika, salt, and pepper.
Remove each chicken strip from the buttermilk, letting the excess drip off, then dredge thoroughly in the seasoned flour mixture.
Press the coating firmly onto the chicken with your fingers to ensure it adheres well for a superior crunch.
Heat the avocado oil in a large non-stick skillet over medium-high heat until it begins to shimmer.
Carefully place the chicken in the pan and fry for 4 to 5 minutes per side until the coating is deeply golden and the chicken is cooked through.
Steam the green beans in a small amount of water for 4 minutes until bright green and serve immediately alongside the crispy chicken.