Beef meatballs bound with cornmeal and simmered in broth with potato, cassava and saffron until the vegetables give the pot its body. It is a stew rather than a soup, it takes an hour, and it serves five.
You can cut the time with a pressure cooker: about 10 to 15 minutes from the moment it starts to whistle. The note on this page said after it starts chopping, which was the Spanish pitar, to whistle, translated as though it meant something else. Cornmeal is what binds these rather than breadcrumbs, and half a cup for a pound of beef is a firm mix that holds together in the pot without needing egg. Wheat flour does the same job if that is what you have. Order matters. The meatballs go in first and get 30 to 40 minutes, and the potato and cassava go in after, because cassava in particular falls apart if it is cooked as long as the meat. What thickens this is the starch coming out of those two vegetables, which is why it ends up a stew rather than a soup.