01 - 
                Heat oven to 275°F. Place brisket in large roasting pan.
              
              
              
                02 - 
                Mix ketchup, onion soup mix and water. Pour over brisket, coating both sides.
              
              
              
                03 - 
                Cover tightly with foil, avoiding contact with meat. Cook 7-8 hours until tender but not falling apart.
              
              
              
                04 - 
                Let rest 1-2 hours before slicing against grain into 1/2-inch slices.