Season meat with spice rub and brown on all sides of roast in large pan or Dutch Oven. Use drippings to brown onion, carrots and celery.
Add garlic and sweat for 1-2 minutes.
Toss in quartered or halved potatoes, add stock, Worcestershire sauce, red wine vinegar, and sugar. Add herbs by tying them together or pick and mince them.
Braise the Chuck Roast at 300 degrees for several hours until meat is tender.
Let the roast rest for at least 30 minutes, covered.
While the meat is resting make the gravy.
Combine all ingredients in sauce pot, except for the cornstarch and ½ cup water. Strain and return liquid to the sauce pot and bring to a boil. Slowly whisk cornstarch slurry into the boiling liquid, stirring constantly. Bring to a boil, reduce heat to low until serving.