| 1. | With a sharp knife, make slits in the pork every inch (2.5 cm) or so at regular intervals. |
| 2. | Combine the garlic, rosemary, olive oil, pepper, and salt (if using) in a small bowl. Rub the mixture over the roast and refrigerate for at least 2 hours or overnight. |
| 3. | Before you are ready to roast the pork, preheat oven to 400°F (220°C, Gas Mark 6). |
| 4. | Spray an oven proof roasting pan with cooking spray and place the roast in it. Roast until an instant-reading meat thermometer registers 160°F (71°C), about 1 1/4 hours, basting once. Transfer the pork to a warmed platter. Keep warm. |
| 5. | Pour off any fat in the roasting pan. Deglaze the pan with wine and reduce over high heat, scraping up all the cooked bits, until the wine is reduced by 1/3. |
| 6. | To serve, slice in thin slices and spoon the wine sauce over the slices. Garnish with rosemary sprigs, if desired. |