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.
Instructions. 1  Pre-heat the oven to 400Â°F (200Â°C). 2  Place the lamb chops in an oven proof baking dish with the onion chunks around the chops. 3  Season with salt and pepper then place them in the preheated oven to bake - 30-45 minutes depending on how well done you like them. Season with salt and pepper then place them in the preheated oven to bake - 30-45 minutes depending on how well done you like them. 2  Meanwhile, in a small saucepan, melt the butter and cook the onions over a low heat for 5 minutes.