Preheat oven to 400 degrees F. If using whole chicken, cut the chicken into 8 pieces, then sprinkle the chicken evenly with salt and pepper.
Heat ghee in a large oven-safe skillet over medium high heat.
Pan fry the chicken skin side down for 5 minutes, then flip. Cook for another 3 minutes, then remove from the pan and set aside.
Add onion to the same skillet and cook stirring for 3 minutes, and then add garlic for 1 minute.
Add bone broth, dijon mustard, and thyme, and stir and scrap the bottom of the pan to deglaze.
Add chicken back in to the skillet with the skin side up. Transfer to the oven and roast for 25-30 minutes, or until the chicken reaches an internal temperature of 165 degrees F.
Remove the chicken from the pan to set aside, then heat the skillet over medium high heat on the stovetop to simmer the sauce until thickened, about 3-4 minutes.
Whisk in coconut milk and simmer for another minute.
Turn off heat, and add chicken back to the skillet. Spoon the sauce over the chicken, then serve warm.