Clipped from a cooking magazine. I also saw it on epicurious.com. The cook's note associated with the recipe stated: Brisket improves in flavor if braised 2 days ahead, cooled in sauce, uncovered then chill, surface covered with parchment paper or wax paper and pot covered with lid. Remove any solidified fat before reheating. Slice cold meat across the grain and reheat in oven with the sauce in a shallow baking pan, covered, for 45 minutes.*Cover the meat in the liquid as much as you can while cooking to avoid the meat from drying out. I tried to add more beer and balsamic later but it didn't taste the same. I think beef broth or water would have been a better choice to get more liquid for gravy.