Step 1

Preheat oven to 375ºF. Line a roasting pan with aluminum foil and place a rack in the pan.

Step 2

Combine crushed garlic, rosemary, lemon juice, mustard, olive oil, salt and pepper; mix well and rub mixture all over lamb.

Step 3

Roll the lamb and use butcher's twine to tie it together and place it on the prepared roasting pan.

Step 4

Roast in the oven until medium-rare and a meat thermometer inserted in center reads 135-140ºF, anywhere from 70 minutes and up depending on the size of your roast.

Step 5

Remove the lamb and let it rest about 15 minutes on a cutting board. Keep in mind the temperature will increase a few degrees once it rests.

Step 6

Slice lamb into 1/4-inch thick slices and place on a serving platter.