Fried fish with onions in dark soy sauce

Ingredients:
3 pieces mackerel
1 onion (peeled and sliced)
Dash of salt 
4 tbsp cooking oil
Dark soy sauce (amount differs from types of sauce used)
1/2 cup water
Dashes of grounded white pepper
Dash of sugar (to taste)

Methods:

1. Rinse fish, dry with kitchen paper, rub with a bit of salt and set aside for about 15 minutes.
2. Heat cooking oil in a wok, add fish and fry until both sides are lightly brown.  Dish, drain and set aside for later use.
3. Heat the remaining oil and saute onions until soft, quickly drizzle in dark soy sauce, stir to lightly caramelize, then add water, pepper and sugar.  Taste for correct seasoning.
4. Bring to the boil, then add fish and simmer until the fish has absorbed some of the sauce and sauce has reduced.
5. Off the heat, dish the fish onto a serving dish and topped with the onions and leftover sauce.
6. Serve when hot with a plate of freshly cooked rice.

 Notes: To have a nice contrast in colour, add some sliced chilies to the onions.  I did not add in my cooking as my grandson is not a fan of chilies.