Finely chop/grate the garlic and rosemary then combine with olive oil, lemon juice, salt and pepper.
Pour over the lamb chops then cover and allow to marinade for at least 30 minutes but ideally up to 4 hours.
Preheat a grill (I like to cook lamb chops over medium-high heat) or grill pan.
Add the lamb chops and allow to cook for 5-6 minutes per side, depending on thickness. Stand the lamb chops on their fat caps and allow to cook for another 4-5 minutes until crisp and golden. If you prefer them to be less done, cook them for 3-5 minutes per side but allow the fat to render and crisp for the best end result.
Remove the lamb from the heat and allow to rest for 5 minutes then serve with lemon.