A good fish soup is made with several types of fish - the more, the better. Pour cold water over the well-cleaned fish, salt it and boil on medium heat until semi-cooked.
Then add the pieces of fish, keep boiling until the potatoes soften. At the end, add in the finely chopped tomatoes and spices and boil another 7-8 min.
Serve the soup hot, you can also add a little lemon juice.