Preheat oven to 350
Trim the brisket (if you haven't already done so)
Make a dry rub by combining all of the dry ingredients, and season the raw brisket on both sides with the rub
Place brisket in a roasting pan uncovered, and roast for 1 hour at 350-degrees
Remove brisket from oven, add the beef stock so that there's about 1/2 inch of liquid in the pan. If you have a big pan, you may need more than 1 1/2 cups of beef stock or you can also add water.
Lower oven to 300, cover pan tightly and cook for an additional 3-hours or until fork-tender.
Slice meat thinly across the grain. If desired, top with juice from the pan.