Using a sharp knife, cut the salmon into thin slices. Place the salmon in a non metallic dish

FOR THE MARINADE :

Mix together the soy sauce,ketchup,vinegar, sugar and garlic

Pour the mixture over the salmon,toss and marinate for about 30 minutes

Meanwhile, heat 1 tablespoon of the oil into a frying pan or wok

Add the leeks into the pan and stir fry over a medium heat for about 10 minutes or until the leeks become crispy and tender

Using a slotted spoon remove the leeks from the pan into a plate

Add the remaining 2 tablespoon of oil into the pan.

Add the salmon and the marinade sauce and cook the salmon for 5 minutes or until the salmon is cooked through.

Spoon it over the leeks.Drizzle the sauce on the salmon and serve immediately