@adfbf87b ah!! Now I am curios and I must look into this.  I remember reading that some state govts provides subsidies for mushroom farming. I know that several vegetarians in India don't eat mushrooms because they are not plants and mushrooms make up a very small segment of the food market here but there is plenty of scope especially for regenerative agri - after all mushrooms are really good decomposers. There aren't many varieties being farmed in India (restricted to mostly button and oyster varieties from what I know).

I love 'em especially ever since I found out that they are a good source of Vit D - something I am really deficient in. 

 @fc5a6d19 maitake mushrooms are really high in vitamin D and they are very savory. I brown them in a little oil prior to combing with other ingredients. It could make a really nice tarka. I also combine dried maitake powder with wheat flour for savory breads. 

Mushroom farming is becoming quite the thing in North America, so much that you can buy mushroom compost for use in gardens. Such dark fluffy soil!