Beef Brisket with Pearl Onions and Baby Carrots

Name: Beef Brisket with Pearl Onions and Baby Carrots
Ingredients: 1 5-pound flat-cut beef brisket, fat trimmed; 3 tablespoons olive oil; 7 cups finely chopped onions; 1 cup finely chopped carrot; 1 cup finely chopped celery; 2 tablespoons chopped garlic; 2 750-ml bottles dry red wine; 8 large fresh thyme sprigs plus 1 tablespoon chopped fresh thyme; 2 bay leaves; 8 cups chicken stock or canned low-salt chicken broth; 1 pound baby carrots, peeled; 12 ounces pearl onions, blanched, peeled