1Remove mesh from thawed turkey. Lay turkey out as flat as possible on a cutting board, placing the skin side down.
2Combine garlic, rosemary, pepper and salt in the work bowl of the food processor with the steel blade in place, or in blender. Turn motor on. Add the oil, processing until coarsely chopped.
3Spread half the garlic mixture over the inside of the turkey. Reroll the turkey.
4Spread outside of roll with remaining garlic mixture. Wrap firmly in microsafe plastic film. Secure firmly with string. Pierce film in two or three places with fork.
5Place on microsafe cooking rack over microsafe roasting pan.
6Microwave at HIGH power for 10 minutes. Turn roast over.
7Microwave at MEDIUM power for 35 to 40 minutes, turning roast 2 or 3 times while cooking, until roast registers 170 degrees F in several places (use instant reading thermometer the check temperature).
8Thicken pan juices for gravy, if desired.
9Remove from microwave. Let stand, covered, for 15 minutes. Cut thin slices to serve.
10Garnish with orange slices and rosemary, if desired.