There is no way for me to make a trip to the grocery store and come without "mus-rooms"- my little girl's insistent request. And they go into different dishes, from curries to roasts, but this time a soup was in order. The technique used for makeing "cream of..." type soups is that of making of gravies, using a thickening agent, either flour or starch.
Here I used brown button mushrooms and spiced up the soup with black pepper and celery seeds. Yum.