Saffron Chicken Noodle Soup

Name: Saffron Chicken Noodle Soup
Ingredients: 1 whole chicken (about 4 pounds), cut into 8 pieces (with backbone); 2 leeks, cut into thirds, well washed; 3 celery stalks, 2 cut into thirds, 1 thinly sliced (½ cup); 4 carrots, 2 cut into thirds, 2 peeled and thinly sliced (1 ¼ cups); 4 flat-leaf parsley sprigs, plus small whole leaves for serving; 1 dried bay leaf; 2 pinches saffron, crushed (¼ teaspoon); ½ teaspoon black peppercorns; Kosher salt and freshly ground pepper; 4 ounces egg noodles