Mix all ingredients for marinade in a plastic container. Add chicken and massage, then cover and refrigerate for 2 hours - overnight.
Preheat a large skillet (preferably cast-iron) over medium heat.
Preheat oven to 350°F.
Remove chicken and discard excess marinade. Pat chicken breasts dry and season chicken with more kosher salt and freshly ground black pepper.
Place ghee to hot pan and sear chicken breast for 4 minutes on each side. To get a good golden-brown sear, don't overcrowd the skillet, and cook in two rounds if necessary.
Place seared chicken on a baking sheet and put in oven for 15 minutes or until thermometer reads 165°F when inserted into thickest part of the chicken breast.
For meal prep, let chicken cool fully before portioning into meal prep containers. Happy eating!