Heat oven to 350ºF. In ovenproof 4-quart Dutch oven, mix potatoes, turnips, rutabaga, celery, carrots and onions.
In small bowl, mix flour and broth until smooth. Stir broth mixture and remaining ingredients except burger pieces into vegetable mixture. Heat to boiling over medium-high heat. Stir in burger pieces.
Cover; bake 50 to 60 minutes, stirring occasionally, until vegetables are tender. Remove bay leaf.