Cut onion into cubes and cook in oil until translucent. Add peeled and cut into slices carrot and parsnip. Fry for about 3 minutes, stirring occasionally. Cover and fry for about 10 minutes, stirring occasionally, at the end add ginger.
Pour hot broth, bring to boil and cook covered for about 20 minutes or until vegetables are tender. Blend the soup into cream. Add heavy cream and blend once more.