What does soup have to do with the origins of life ... Skim the surface with a ladle to remove any foam that rises. Lower the heat and simmer very slowly for 45 minutes. Strain the stock through ...

Stir in soy sauce and ponzu. Discard kombu. Working in two batches, carefully ladle soup into a blender and purée until smooth. Return soup to pot. Season with salt and pepper. Make the croutons ...

Season to taste with salt and freshly ground black pepper. To serve, ladle the fish soup into soup bowls, scatter with parsley, drizzle with olive oil and serve immediately.