You have to first soak the dried mushrooms in hot water for about 15 minutes. Meantime heat the stock in a saucepan and add the fresh mushrooms, onion and wild rice and let it simmer a bit.
Then take the dried mushrooms (keep the liquid in which they were soaked) and add to the soup. After straining the liquid add this also to the saucepan. Within about 30-40 minutes the wild rice should become tender after which you can season the soup with salt and pepper.
I served it in little bowls garnished with some sour cream and parsley. My husband, who rarely likes soup, really adored this recipe and like Oliver Twist kept asking for more!