1.Preheat oven to 350 degrees F.
2. For roast: Heat a large Dutch oven, with a lid, over medium-high heat. Season meat generously with salt and pepper, and sprinkle lightly with flour. Add oil to pot, add meat, and sear on both sides until brown, about 10 minutes. Transfer meat to a plate. Pour all but about 2 tablespoons of oil from pan.
3. Add onion, carrots, celery, and garlic to pan, and cook until vegetables are tender, about 8 minutes. Add tomatoes and cook until liquid has thickened, about 5 minutes more. Add wine, and scrape up browned bits from bottom of pot using a wooden spoon. Add broth, thyme, and bay leaves; bring to a boil. Return roast to pot, cover, and cook until roast is tender, about 1 1/2 hours. Remove lid and continue to cook, uncovered until very tender about 1 hour more.
4. For Vegetables: place carrots, turnips, onions, and parsnips on a baking sheet and toss with olive oil, thyme, 2 teaspoons salt, and pepper to taste. Roast on a shelf under pot roast for final hour, stirring occasionally, until tender.
5. Transfer roast to a plate and cover loosely with foil. Skim fat off surface of liquid and discard. Bring sauce to a boil over medium-high heat, and cook until thickened. Stir in parsley, vinegar, and salt and pepper, to taste. Keep roast warm in sauce until ready to slice.
6. Slice pot roast and arrange on a platter with vegetables. Pour some of sauce on top and serve remainder alongside.
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