Take pan out of oven. Carefully flip brisket over, fat side up. Replace foil and return to oven. Turn off heat and leave brisket in oven 1 additional hour. Remove the brisket from the oven and let rest for 15 minutes. Transfer the brisket to a cutting board and thinly slice it across the grain. Transfer the sliced meat to a platter, pour the pan juices on top, and serve at once.