In a large bowl, mix the cassava flour with 2 cups of water until smooth.
Pour the mixture into a large pot.
Cook over medium heat, stirring continuously to prevent lumps.
Once the mixture starts to thicken, reduce the heat to low. Continue stirring for about 10-15 minutes, or until the kossou is thick and smooth.
If using, stir in the palm oil or vegetable oil for added flavor.
In a separate skillet, heat a small amount of oil over medium heat.
Add the finely chopped onion and cook until softened and translucent, about 5 minutes.
Stir in the minced garlic and chopped hot peppers, cooking for another 1-2 minutes.
Season with salt and ground crayfish or shrimp powder (if using).
Enjoy your meal!