Add oil and chopped onions in a sufuria and saute for a few minutes until golden brown.

Add the washed chopped tomatoes and stir to mix the let it cook for 3 minutes or until soft then add the salt and water for soup.

Let it cook for 5 minutes and add the royco and stir. Dip in the fish in the soup and cover. Let it simmer for 10 minutes

Remove from heat and serve hot