Brisket is the basis for a flavorful and hearty beef with potatoes, onions, and corn. The brisket is slow-simmered for 2 1/2 hours, so plan ahead. You may wish to cook the brisket a day in advance so you can refrigerate it to remove the grease. Then reheat, add the vegetables and finish. "National cowboy hall of fame chuck wagon cookbook" By b. Byron price.