Do a web search on "white miso recipes" & you'll find dozens & dozens of recipes using it. Everything from different soups, to vegetable dishes, sauces, even a roast lamb dish from Food and Wine magazine. A very interesting selection that I plan to return to & do some copying/pasting myself, since I also have a container of miso in the fridge that I'd like to use for more than just Japanese soups.
IC I have neither made nor heard of misoyaki, but after a quick Google I see what it is and I have to say that sounds like an interesting way to go.
I love raw salmon, but cooked salmon is not something I really enjoy. I think I am going to give it another shot with miso though. It sounds like it goes together quite well and I would love to find a cooked salmon dish I like.