Chinese Duck and Noodle Soup

One of the great things about Asian soups, especially Chinese soups, is the ease with which a little broth and seasoning can be turned into a complete meal, just by adding noodles. This is such a soup, inspired in part by soups I’ve eaten in Asian noodle shops and in part by its well-loved American cousin, chicken noodle soup. My knowledge of Chinese cooking is skimpy, but with a few Chinese ingredients, I’m able to make a Chinese-seeming soup out of just about anything. The secret ingredie