this is an introduction of how to cook meatball soup:First, boil some water in a pot. And during the time of this process, take out a bowl and make the ingredient. It contains vinegar, soy sauce, salt , pepper. You can decide the quantity on your own taste. Then, chop half of a spring onion into small slices and also some caraway. Then, put them in the bowl. After the water is boiled, put the meatballs into the pot until they are floating on the water. And at last , put the ingredients in the pot and sir them with a ladle for some minutes, then the soup is done. Now , you can have a taste of this simple but delicious soup....