Cut the carrots, rutabaga, squash and turnip into ½-in. cubes. Dice the onion and celery.
Heat the olive oil in a large saucepan, add the onion and sauté for 5 minutes over medium heat.
Add the celery, carrot, rutabaga, squash and turnip to the sauté pan; sauté 2 to 3 minutes.
Add the water and bay leaves, bring to a boil, and then reduce to a low, simmering heat. Cover and simmer for 15 minutes or until vegetables are tender.
Stir in the cream and miso.
Simmer gently for another 5 minutes.
Garnish with chopped parsley.