Steamed Salmon with Leeks Ala White Ginger

I tried the similar dish at White Ginger, Seattle, and wonder why this simple dish tasted so yummy. After trial and errors, here is my version of Steamed Salmon with Leeks...
Ingredients:
300 gr of salmon fillet, cut into rectangle pieces about 6x10 cm
1 leeks, cut about 6 cm pieces and sliced thinly (this dish use lots of leeks)
lots of ginger (around 50 gr), sliced thinly
sauce: 1 cup of light soya sauce, 1 cup of mirin, 2 cup of sugar, cooked while stiring until boiling, set aside
How to make:
1. Place salmon, ginger on the surrounding and top in a steam bowl, then steam until it's well-cooked, but not to dry
2. How to serve: take the ginger off and surround salmon with sauce and top with leeks to your taste, and see how simple dish become so yummy...