Chop the onion and fry with sunflower oil until brown.

Add the chopped vegetables and cover with water.

Add the vegetable stock. (You can also prepare your own mixture of herbs and spices to replace the stock)

Simmer for 20 minutes stirring from time to time.

Apply salt and pepper to both sides of the fish and add them to the vegetables.

Cook for an additional 10 min.

Sprinkle the flour over the stew and mix gently.