3 minutes ago, TdeV said:
Cooking with Mushrooms: A Fungi Lover's Guide, by Andrea Gentl, named a Best Cookbook of 2022 by Bon Appetit.
Yes, you did mention that book but that is the only source for this claim. That makes it suspect. And I think you reached the conclusion that it was not a good substitute for salt. You said that the meatballs "lacked pizzazz".