Follow these easy steps to prepare an incredible lamb roast:

1. Prepare the Marinade: In a bowl, combine minced garlic, rosemary, thyme, parsley, olive oil, salt, pepper, lemon zest, and lemon juice. Mix well.
2. Marinate the Lamb: Rub the marinade all over the lamb, ensuring even coverage. For best results, let it marinate in the refrigerator for at least 1 hour, or overnight for deeper flavor.
3. Preheat the Oven: Preheat your oven to 350°F (175°C).
4. Prepare the Roasting Pan: If using vegetables, place them in the bottom of a roasting pan. They will absorb the flavors from the lamb as it cooks.
5. Place the Lamb in the Pan: Position the marinated lamb on top of the vegetables in the roasting pan. Pour the broth around the lamb to keep it moist during cooking.
6. Roast the Lamb: Place the roasting pan in the preheated oven. Cook for approximately 1 hour 30 minutes to 2 hours, or until the internal temperature reaches 145°F (63°C) for medium-rare.
7. Baste Occasionally: Every 30 minutes, use a baster or spoon to drizzle the juices from the pan over the lamb to keep it moist and flavorful.
8. Check for Doneness: Use a meat thermometer to check the internal temperature. For medium, aim for 160°F (71°C).
9. Remove from Oven: Once cooked to your desired doneness, carefully take the lamb out of the oven.
10. Rest the Lamb: Let the lamb rest for 15 minutes before carving. This allows the juices to redistribute, ensuring a tender roast.

These straightforward steps will guide you in creating a lamb roast that is both impressive and incredibly delicious.