1. Soak the bone in clear water for about 3 hours, change the water in the middle 1 time, and then clean it for later use.
2. Boil water in the pot, add the washed bones, boil over high fire, cook for about 3 minutes, and remove the washed floating foam.
3. Put the blanched bones into the cooking machine, and then pour in enough water.
4. Wash and cut the corn and yam into pieces, put them into the pot, then put the green onions and ginger slices into the pot together, then cover the pot and choose the broth mode.
When the soup is cooked, season it with salt and pepper, and then sprinkle with chopped parsley.
6. done.