Directions. 1  Preheat oven to 450 degrees. 2  Season lamb racks with salt and pepper; coat each evenly with 3 Tbsp pesto. 3  Roast on baking sheet until about 5 degrees less than desired doneness (about 20 min for medium). 4  Transfer lamb to clean platter; let rest 10 min before slicing.
Preheat the oven to 400 degrees F. Using your hands, rub the lamb all over with the lemon juice. Pat the garlic and rosemary evenly all over the surface of the meat. Season the meat with the salt and pepper and place the lamb in a roasting pan. Place the lamb in the oven and roast for 30 minutes.
Instead of roasting lamb chops in the oven throughout cooking, consider searing the meat on high-heat first. You can use a small amount of oil and a large skillet to sear the lamp chops for about three minutes on each side. The skin of the chops should be browned before removing from the heat. Cover the lamb chops in a roasting dish after browning, and cook in a 400 degree Fahrenheit oven for 10 to 15 minutes depending on how well-done you want the meat. If you want lamb chops medium-rare, the internal temperature on the meat thermometer should register 140 degrees Fahrenheit.