You might try putting a potato in it and then cooking it for a while to see if the potato will absorb some of the flavor. This works for salt, but I don't know if it will work for ginger. Leave the potato in big chucks and remove and discard (or mash it with some parsley and brown or white sugar - it might taste good?)
Add all of the ingredients again, except the ginger, essentially doubling the recipe. Freeze half of it in ziplock freezer bags to eat another time.
Add celery and/or carrot (not pureed). They might dilute the ginger flavor, but they will also change the flavor of the soup.
Remove a cup of the soup and add a cup of milk.