I wanted to use the stems of the mushrooms that my husband doesn't really like me to put into my recipes because I so hate to waste good food so I created this recipe that will utilize them and be delicious.
cut the ends off of mushroom stems or slice any other part of a mushroom that you want to use. Peel your onion.
place all ingredients in pan, bring to a boil, let simmer for 20 minutes or until broth has the flavor you like. Remove vegetables from broth.
I added extra prep and cooking time because you can do so much more with this recipe. If you have a larger amount of mushrooms to use you can just add a comparable amount of water, then let cook down to give your stock a rich texture.
you can also chop mushrooms and onions smaller and leave in broth or puree slightly cooled vegetables in food processor if you like the texture.