In a large, shallow glass dish, stir together olive oil, lemon juice, garlic, rosemary, salt, and pepper. Add lamb chops and turn to coat in the marinade. Cover and let marinate at room temperature for one hour.

When ready to cook, preheat the oven to 400°F and heat a cast iron skillet over medium high heat. When heated, use tongs to transfer the lamb chops to the cast iron skillet and discard any remaining marinade.

Cook on one side for 3 minutes, flip and then immediately transfer to the oven to finish cooking. Bake in pre-heated oven until a thermometer inserted into the center reads 5 degrees below desired final temperature (4-5 minutes for 135 degrees F, which will rest up to 140°F after resting for a medium temperature).

Remove chops from the oven and from the cast iron skillet and let rest for 5 minutes. Serve with any grain and/or salad of choice.