Specific practices:
1. Wash the corn residue, soak it for one night in advance, pour out the water the next day, wash it again, put the corn residue and washed rice in the pot, and put three bowls of cold water on it.
2. After boiling water, turn to medium heat and cook for about 30 minutes.
After 3.30 minutes, the oatmeal was washed with water.
4. Pour it into the pot and boil it again, and the oatmeal is ready.