How to Make It
Heat oven to 400° F. In a food processor, pulse the lemon zest, garlic, 2 tablespoons of the oil, and 1 teaspoon each salt and pepper until coarsely chopped.
Place the lamb in a large roasting pan and rub with the lemon mixture. In a large bowl, toss the carrots, 1 tablespoon of the remaining oil, ½ teaspoon salt, and ¼ teaspoon pepper; set aside.
Roast the lamb to the desired doneness, 90 to 105 minutes for medium-rare (internal temperature registers 130° F*), adding the carrots to the pan after the lamb has cooked for 50 minutes. Transfer the lamb to a cutting board, cover loosely with foil, and let rest for at least 15 minutes before slicing.
Meanwhile, in the food processor, puree the parsley, mint, scallions, honey, lemon juice, the remaining ½ cup of oil, ¾ teaspoon salt, and ½ teaspoon pepper. Serve with the lamb and carrots.
*Note: This is the temperature preferred by the Real Simple test kitchen, and it is considered safe by many experts. The U.S. Department of Agriculture’s recommendation for maximum safety is 15° to 20° F higher.