In a Dutch oven or a large, heavy saucepot, heat the oil over medium high heat. Add the meat and brown on all sides. Add the tomato paste and garlic and cook until the garlic is lightly browned. Add the beef stock, wine, and bay leaves. Over high heat, bring the mixture to a boil. Reduce the heat to low, cover the pan tightly, and simmer (DO NOT BOIL) for about 2 hours.
While the meat is cooking, in a large skillet, heat 1 Tablespoon of the butter over medium high heat. Add the carrots, celery, and onions and cook for 5 to 10 minutes, or until softened slightly. Add the vegetable mixture to the Dutch oven after the meat has cooked for 2 hours. Cover and continue cooking 30 to 60 minutes longer, or until the meat is tender.
Transfer the meat and vegetables to a serving platter. Pour the cooking liquid into a large bowl and reserve. Discard the bay leaves.
In the Dutch oven over medium heat, melt the remaining 6 Tablespoons of butter. Whisk or stir in the flour until smooth and bubbly. Continue cooking, stirring constantly, for 2 to 3 minutes. Gradually whisk in the reserved beef stock, blending completely after each addition. Cook, stirring constantly, until the mixture boils and thickens. Season the sauce with salt and pepper.
Slice the roast and serve with the vegetables and the sauce. Makes 8 to 10 servings.