Preheat the broiler. Line a sheet pan with parchment paper or aluminum foil and brush with some of the ghee. Remove the chicken from the marinade, and wipe off excess marinade. Brush the breasts with ghee and season both sides with salt and pepper, to taste. Arrange on the baking sheet in an even layer. Broil until golden brown on both sides, about 4 minutes per side.
Remove the chicken from the heat and to a cutting board. Let the chicken rest for 5 minutes and cut it into 1-inch thick slices. Transfer the chicken to a platter and serve.