Step 1

One hour before cooking, remove the lamb from the refrigerator and remove any packaging but be sure to leave the netting or twine in place.

Step 2

In a small bowl, combine the garlic, 2 tablespoons of olive oil, rosemary, salt, and pepper. Rub the mixture all over the lamb and allow it to sit at room temperature for one hour.

Step 3

Preheat the oven to 425 degrees.

Step 4

Place the potatoes in the bottom of a roasting pan and drizzle with the remaining 2 tablespoons of oil. Sprinkle with a little salt and pepper. Place the lamb on a rack above the potatoes.

Step 5

Cook for 30 minutes.

Step 6

Reduce the oven to 350 degrees. Remove the pan from the oven and add the tomatoes and artichoke hearts to the bottom of the pan.

Step 7

Continue cooking until the lamb reaches an internal temperature of 135 degrees for rare or 145 for medium (about 10-12 minutes of additional cooking time per pound of lamb). If you prefer the meat more well done, continue cooking for an additional 10 minutes or until the internal temperature reaches 155 degrees.

Step 8

Remove from the oven, cover with foil and let the lamb rest for 15-20 minutes. Remove the netting or twine and slice.

Step 9

Serve with the potatoes, tomatoes, and artichoke hearts along with some of the pan juices spooned over.