Slow Cooker Pork Roast

Name: Slow Cooker Pork Roast
Ingredients: 3 tablespoons fresh rosemary leaves; 3 tablespoons fresh sage leaves; 1 tablespoon fresh thyme leaves; 5 tablespoons olive oil; One 5- to 6-pound boneless pork shoulder with a fat cap; Kosher salt and freshly ground black pepper; 1/2 cup dry white wine; 2 large cloves garlic, finely chopped; 1/4 teaspoon ground allspice; 4 large carrots, cut into rough 1-inch chunks; 4 celery ribs, cut into 2-inch-long pieces; 1 large onion, trimmed but left intact at the root end, cut into eighths; 2 bay leaves; 1 cup low-sodium chicken broth; 3 to 4 teaspoons cornstarch; 1/4 cup chopped fresh parsley; Buttered egg noodles, for serving