Throughout Vietnam, there are many kinds of soups, “canh,” served all year long. I particularly love enjoying this warm, flavorful bowl of Vietnamese chicken soup on laid-back weekends, but it's also great packed in a Thermos for lunch. It's the perfect bok choy soup, too! —Brenda Watts, Gaffney, South Carolina, Can you freeze Vietnamese Chicken Meatball Soup with Bok Choy? Before adding the egg, cool the soup. Freeze in freezer containers. To use, partially thaw in the refrigerator overnight. Heat through in a saucepan, stirring occasionally; add broth or water if necessary. Without stirring, drizzle beaten egg into the soup. Let stand until egg is set, 2-3 minutes.