2. Wash yam with clear water in advance, peel it, and then soak it in warm water for about ten hours. Take it out after soaking and cut it into pieces for later use.
3. Wash the prepared ribs with clear water, remove the blood, chop them into small pieces with a knife, then pat the ginger with a knife, peel the onions, wash them and cut them into sections.
4. Put the processed yam and ribs together in a casserole, then put the ginger and onion together, add a proper amount of water, boil with low fire, and then simmer for about 90 minutes with low and medium fire.
5. After stewing, add proper amount of edible salt, chicken essence, monosodium glutamate and pepper to taste. Stir well, cook for about five minutes, and then turn off the heat. At this time, the stewed ribs with yam are ready, and you can take them out at any time when you want to eat them.