Heat the palm oil and fry the momoni making sure to break it down into smaller bits in the oil as you fry it. This should take about a minute.
Add onions and fry them for about 2 minutes.
Add blended tomatoes, scotch bonnets or kpakposhito and shrimp powder and cook for about 2 minutes.
Add crabs and then dried herring, and then the clams. Add enough water to just about cover the ingredients and allow to simmer for another 10 minutes.
In a separate pan, add 2 tablespoons of water to the grated okro and cook for about 1 min. This is mainly to tease out the slime without having to overcook it in the stew base. See notes 2.
Add the fresh shrimp and mackerel to the stew. Avoid over stirring especially if the smoked mackerel is not firm.
Add okro from the other pan to the soup and mix through, letting it cook for a further 3 min. Turn off heat but do not cover soup completely with the lid.
Turn off the heat but do not cover the soup completely with the lid.
Serve with banku or kenkey or Gari