Wash and pound Atama leaves using a mortar and pestle, the dry mill of your blender or food processor, set aside.
Using a big knife cut off the tails of the periwinkle (or use a plier). Wash in several changes of water until the water is clear.
Wash the meat and Ponmo, place in a pot, season with salt and seasoning cube. Add a little water and place over medium heat. Cook until the meat and ponmo have softened.
Rinse and add stockfish. Cook until meat is tender.
Soak dry fish in boiling hot water for 2 minutes, drain and rinse well with cold water.
Pour the palm nut extract into the meat. Add uyayak and Periwinkle, bring to a boil.
Add dry fish, pepper, crayfish and seasoning cubes. Stir well and taste, add salt.
Cook for about 5 minutes, add Atama and cook for a further 5 minutes and take off the heat.
Serve with swallow, white rice or Ayan Ekpang.