Recipe originally called for a chuck roast but the picture was definitely not a chuck roast. Next time, I will buy a better cut of meat. It also called for beef broth but due to sodium, I used water and it was really tasty that way.
Place beef chuck roast into a slow cooker and scatter onion quarters around the meat. Pour the water over the meat and sprinkle the au jus mix, Italian salad dressing mix, salt, and black pepper over the roast.
Cover cooker, set on Low, and cook until meat is very tender, 6 to 8 hours.