Roasted Loin of Pork Stuffed with Prunes

Name: Roasted Loin of Pork Stuffed with Prunes
Ingredients: ½ pound pitted prunes; ½ cup bourbon; One 3- pound boneless center pork- loin roast, about; 3 pounds (ask your butcher to bone the rib roast, or you can do it yourself, and trim the fat); 10 fresh sage leaves; Salt and freshly ground black pepper; 2 tablespoons extra- virgin olive oil; ½ cup ¼- inch dice carrot; ½ cup ¼- inch dice celery; ½ cup roughly chopped onion; 4 cloves garlic, crushed and peeled; 2½ cups chicken stock or canned low- sodium chicken broth