Beef ribs pressure cooked with potato, then finished with scallion and cilantro blended together and stirred in at the end. The Colombian breakfast broth, and the standard cure for the morning after.
The blended scallion and cilantro at the end is what makes this a caldo de costilla rather than a beef soup. It goes in raw and off the heat, so the aroma stays: boiled for even a minute it turns dull and grey. Ribs with plenty of bone give a better broth than meaty ones, since the bone and marrow are doing the work. In Colombia this is breakfast, served with an arepa and a cup of chocolate, and it has a long-standing reputation as the cure for a heavy night, which is why it is called a levantamuertos. Whether it works is another matter, but it is hot, salty and restorative.