What I do for something different than just plain salmon is:

Put the salmon down on foil that is not sprayed with oil and a big enough sheet to wrap it up! Then drizzle lemon on top with a little bit of ginger sprinkled and salt with a little bit of honey aswell then wrap it up pop it in the oven for 30 minutes and you have yummy steamed salmon with flavour

And as for the Bok Choy I steam it and then drizzle a little bit of oyster sauce over it in a bowl mix and then put the salmon ontop or you can put it on the side and have mash potato under the salmon