In a large bowl, combine bread crumbs, garlic, rosemary, 1 teaspoon salt and 1/4 teaspoon pepper. Toss in 2 tablespoons olive oil to moisten mixture. Set aside. Season the rack all over with salt and pepper. Heat 2 tablespoons olive oil in a large heavy oven proof skillet over high heat. Sear rack of lamb for 1 to 2 minutes on all sides. Set aside for a few minutes. Brush rack of lamb with the mustard. Roll in the bread crumb mixture until evenly coated.
For the lamb, place the lamb steak into a bowl, rub with the olive oil and season with salt and freshly ground black pepper. Heat a griddle pan and chargrill the steak for 5-6 minutes on each side, or until cooked to your liking. Leave to rest for five minutes.
6 Grill the chops. Add the lamb chops to the grill and grill over high heat with the lid open. If you get any flareups, move the chop to a cooler part of the grill until the flames die down. After about 4 minutes, turn the chops over and cook for another 4 to 5 minutes. As always, this varies based on the temperature outside, the temp and thickness of the meat, and the grill temp. If you use a instant read thermometer, 155Â° F is medium. 7Let it rest.