2 oz Wild Foraged in WNC
Berkeley's Polypore is the soup stock mushroom.
Add 1-2 oz of mushroom to 2 quarts of water
Add veggie scraps, salt, fat. (optional) 
Bring to a boil, reduce heat and simmer 3-6 hours.
 
Pour stock through a strainer into another pot. Compost your mushrooms. 
There's your tasty umami mushroom stock. Enjoy!