Spiralize (or grate) all of the onions, or cut them into long thin strips. If you spiralize, keep all of the onion ends and tuck them into the sides of the baking dish.
Take a 9×13 baking dish, and place a layer of your onions on the bottom. Then take your brisket, and season it evenly with your spices, salt, pepper, and garlic. Then top with remaining onions. Check out my story highlights on Instagram to see how it looks step by step
Top with beef broth
Cover with Aluminum Foil and place in the fridge overnight. (You really can make this Brisket in one day, but we like spacing out the cooking process and the flavor intensifies by letting it sit overnight.
The next morning, take the Brisket out if the refrigerator 30 mins before you will cook it. Preheat the oven to 350°F
Pour the worcestershire sauce over the brisket and place the cover back on.
Bake the brisket for 90 minutes at 350°F then lower the temperature to 325°F and cook for 4.5 hours, basting every half hour. During your last hour, uncover your brisket
Once brisket is done, let it rest for AT LEAST 20 minutes. Then slice it against the grain so it doesn’t fall apart.
Serve and enjoy!