Cream of Mushroom Soup
This type of soup might be falling out of style, but I still love the rich, pure taste. The rice or potato makes the soup creamy and more substantial, but you could skip it. But even 1/4 cup of cream is enough to lighten the color and smooth the texture of the puréed soup.
Other vegetables you can use: asparagus, fennel, celery, watercress, spinach, sorrel, cauliflower, broccoli, tomatoes, carrots, or more flavorful mushrooms like cremini or shiitake.