1. Main ingredients: mung bean kernels, yams, rock sugar and water.
2. For preparing materials, mung beans can also be shelled.
3. Take a pot and add proper amount of water. Put in mung bean kernels and cook first.
4. At this time, peel and cut the yam into small pieces.
5. Cook the mung bean kernels over medium heat until they bloom.
6. Add the yam pieces and cook for 15 minutes. The yam tastes pink.
7. Put in rock sugar and boil until melted, then turn off the heat and put it into a bowl.