Place onions, celery, djangsang, bêpê, quatre côtés, pepper, ginger, garlic, celery, and leeks in a blender and blend into a puree
Chop the tomatoes into small cubes and place them in a pot together with the fish, salt, cooking oil, spice puree and water
Cover the pot, bring to a boil, and simmer for about 10 minutes, stirring occasionally.
Add the chili pepper, add more water if needed, cover and simmer for another 10 minutes until the fish soup has a slightly thicker consistency and the fish is cooked.
Add more seasoning if needed and you're done!