Combine seasoning ingredients; press onto beef pot roast. Heat oil in Dutch oven over medium heat until hot. Brown pot roast. Pour off drippings.
Add 3/4 cup water; bring to a boil. Reduce heat; cover tightly and simmer 2 hours. Add vegetables; continue cooking, covered, 30 to 45 minutes or until pot roast and vegetables are fork-tender. Remove pot roast and vegetables; keep warm.
Skim fat from cooking liquid. Measure and return 2 cups cooking liquid to Dutch oven. Stir in cornstarch mixture; cook and stir 1 minute or until thickened and bubbly. Carve pot roast. Serve with vegetables and sauce.