Place the chicken breast in a shallow dish and pour buttermilk over it, letting it marinate for 15 minutes.
In a small bowl, whisk together the almond flour, arrowroot powder, sea salt, black pepper, garlic powder, and onion powder.
Remove the chicken from the buttermilk and dredge it through the flour mixture, pressing firmly to ensure an even coating.
Heat avocado oil in a skillet over medium heat. Once hot, add the chicken and cook for 5-6 minutes per side until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and set aside to rest. To the same skillet, add the chicken broth, coconut milk, and dried thyme.
Whisk the sauce over medium-low heat, scraping up any browned bits from the pan, until the gravy thickens slightly.
Steam the green beans in a separate pot for 4-5 minutes until tender-crisp.
Serve the chicken alongside the green beans and drizzle the warm gravy over the top.