Season and cook the beef in its own juices (add a splash of water if needed). Set aside with stock.
Boil water to blanch the shoko. While waiting, pick the leaves, removing flowers, seeds, and tough stems.
Thaw spinach in the microwave and squeeze out excess water.
Blanch amaranth by pouring boiling water over it in a large bowl, cover, then drain and rinse with cold water. Squeeze out liquid and chop.
In a pot, combine the soup base, beef, stock, mackerel, panla, ponmo, crayfish, and seasoning. Simmer for a few minutes. Add spinach and chopped amaranth. Stir well, reduce heat to low, and steam for 2–3 minutes.
Adjust seasoning and serve hot.