Place the sliced bones with marrow and onions in a large stockpot, pour in water and bring to a boil. Lower heat and simmer for 40 minutes. Add the beef chunks. Return to a boil, then reduce heat to medium. Simmer until beef is tender, about 1 hour.
Add the potatoes and plantains. Simmer until potatoes and plantains are tender, about 15 minutes. Add the cabbage