Pork with Mushrooms and Barley

Name: Pork with Mushrooms and Barley
Ingredients: 1 cup quick-cooking barley; 4 teaspoons Worcestershire sauce; 4 teaspoons packed light brown sugar; 1 large pork tenderloin (about 1 1/4 pounds), trimmed and cut into 3/4-inch chunks; Kosher salt and freshly ground pepper; 1 cup low-sodium chicken broth; 2 teaspoons cornstarch; 2 tablespoons vegetable oil; 8 ounces cremini mushrooms, sliced; 2 leeks (white and light green parts only), chopped; 3 carrots, chopped; Chopped fresh parsley, for topping