Divide the rack of lamb into individual lamb chops.
Combine the olive oil, minced garlic, chopped rosemary, kosher salt, and black pepper in a small bowl to make the marinade.
Place the lamb chops in a shallow dish and pour the marinade over them, turning each chop to coat thoroughly.
Cover and refrigerate the lamb chops for at least 30 minutes to absorb the flavors.
Heat a grill pan over medium-high heat until hot.
Grill the lamb chops for about 3 minutes on each side, or until an instant-read thermometer reads 135°F (57°C) for medium-rare.
Remove the chops from the heat and let them rest for a few minutes before serving.
Enjoy your lamb chops plain or with a mint apple sauce as a fresh alternative to mint jelly.