Preheat your oven to 425°F and line a baking sheet with parchment paper.
In a shallow dish, combine the buttermilk with garlic powder, onion powder, smoked paprika, salt, and pepper.
Add the chicken breast to the buttermilk mixture, ensuring it is fully coated. Allow it to marinate for at least 15 minutes.
In a separate plate, spread the almond flour. Remove the chicken from the buttermilk and dredge it in the almond flour until evenly coated.
Place the coated chicken on the prepared baking sheet and spray lightly with olive oil or drizzle the olive oil over the chicken.
On another baking tray, toss the green beans with a touch of olive oil, salt, and pepper.
Bake the chicken for 20-25 minutes or until the internal temperature reaches 165°F, turning once halfway through for even crispiness.
Simultaneously, roast the green beans in the oven for about 15 minutes, stirring halfway through to ensure even cooking.
Once both the chicken and green beans are cooked to your desired crispiness, serve them together and enjoy your wholesome meal.