All ingredients ready? Let's begin!
Preheat your oven to 325°F.
Rinse the brisket under cold water and pat dry with paper towels. Generously coat all sides of the brisket with salt.
In a very large skillet over medium-high heat, warm the oil.
Add the brisket to the pan and sear it until all sides are browned. This will take a few minutes. Remove the beef to a roasting pan that is approximately 10 by 15 inches, fat side facing up.
Add the onions to the skillet and sauté them until they start to brown, approximately 4 minutes.
Add the vinegar to the pan and cook just until it bubbles, about 30 seconds. Reduce the heat to medium-low. Stir in the broth, molasses, bay leaves, garlic powder, and thyme. Allow the braising liquid to warm up.
Pour the seasoned broth and onions all over the brisket. Cover the pan tightly with aluminum foil. Place the pan inside the oven and braise for 3 hours.
At 3 hours, remove the pan from the oven. Lift the foil off and scatter the root vegetables around the brisket. Reseal the pan with the foil and place it back in the oven. Continue to bake for an additional hour.
Transfer the brisket to a cutting board. Slice thinly or shred it with 2 forks. Place the brisket on a large serving platter. Using a slotted spoon, place the vegetables around the perimeter of the beef.
Spoon the pan juices over the top of the meat and serve while warm.