1. Preheat oven to 350ยบ.
2. In a bowl combine the oil, lemon juice, thyme, garlic, salt and pepper. Rub the mixture into the pork loin.
3. Place the meat fat side up, on a rack in a roasting pan. Roast about 1 1/2 hours, or 35- 45 minutes per pound.
4. When meat is done, remove to a platter and pour off the fat in the pan. Add stock to the pan and bring to a boil. Thicken if desired, with a little flour mixed with water.