Increase the heat under soup to medium high; stir in noodle pieces. Cook, stirring, until pasta is tender, about 10 minutes. Reduce heat to low, and stir in the 2 tablespoons Italian parsley.

For the soup: 2 tablespoons neutral oil, such as canola 3 medium carrots, peeled and cut into ½-inch dice 3 stalks celery, cut into ½ inch dice, plus leaves 1 medium white onion, cut into ½ ...