Gather all your ingredients.
Peel the skin off the plantains and dice them into very small pieces (tiny pieces make all the difference!).
Add the plantains to a saucepan with just enough water to reach their level. Add seasoning, palm oil, onion, and habanero. Stir well.
Place the smoked mackerel pieces on top, cover, and simmer on medium heat until the plantains are soft.
Add the basil and crayfish. If the pottage is too thick, loosen it with a little water. Let simmer for an additional 2–3 minutes.
Serve hot and garnish with green onions.