Place the brisket fat side up into a large oven safe pot. Pour the soy sauce over the brisket. Then coat the brisket all over with the salt, pepper, garlic powder, thyme, and rosemary. Now place the carrots around the brisket. Add the entire head of garlic (you don't have to peel it, when you don't peel it the garlic becomes soft and delicious inside the skin. Add the onions and broth around the brisket.

Bake on 300F for 2 to 3 hours, around the 2 hour mark, test your brisket to see if it's tender, cook until it basically breaks apart with a fork.

Enjoy!