Mix together Jerk Seasoning, oil and vinegar to turn dry rub into a wet marinade. Place brisket and marinade into a re-sealable plastic bag. Rotate the meat around in the plastic bag in order to thoroughly coat the meat.
Place bag in the refrigerator and allow brisket to marinate for at least 3 to 4 hours (overnight is better). Note that the longer the meat marinates the more spicy it becomes.
Preheat the oven to 250 degrees Fahrenheit.
Place the brisket along with the juices in a roasting pan and cover with foil.
Bake for 3 to 4 hours, or until tender. The drippings in the roasting pan should be served along with the meat.
