Combine first 5 ingredients in a large saucepan; bring to a boil. Reduce heat; simmer, uncovered, 40 minutes or until vegetables are tender.
Pour half of mixture into container of an electric blender; cover and process until smooth. Repeat procedure with remaining vegetable mixture. Return pureed mixture to saucepan; add parsley and remaining ingredients. Cook until thoroughly heated. Serve warm, or cover and chill.