Brisket is a great make-ahead roast. If prepared a day ahead, cool the brisket in the roasting pan and then cover first with plastic wrap and then foil. Refrigerate. The next day uncover and remove the plastic wrap. Skim off the hard fat that has solidified on the pan juices. Recover with foil and warm in an oven preheated to 350 degrees F, about 45 minutes. Continue with the recipe as written.