After the fish is cleaned, wipe the fish with paper towels or a cloth to remove excess water.
Cover the fish with a small amount of salt (inside and out).
Let it sit for an hour and then drain any water.
Peel and cut the potatoes, tomatoes and onions.
OPTIONAL: Some people will prefer to fry the potatoes until they are crispy on the outside to prevent disintegration in the soup.
Start boiling your soup water.
In a pan, add oil and fry the ginger with the fish on low-medium heat (until the fish is completely cooked and the skin is slightly browned).
Put the fish into a soup bag and add to water.
Add potatoes, tomatoes and onions.
Boil for at least an hour.
