The steps for cooking white fungus and red date soup are as follows:

1. Put the above ingredients into a casserole, add water, and bring to a simmer over medium heat.

2. During the stewing process, stir frequently with a spoon to avoid sticking to the pot.

3. After simmering, simmer on low heat for 20 minutes, then turn off the heat.

4. Then cover the lid and let it simmer for another 5-10 minutes.