This is a pretty simple dish derived from a popular seafood treat in a lot of New England restaurants (most notably Jimmy's, a small chain of "affordably classy" meat-and-potatoes places in and around Boston). The original was either lobster or crab meat (I don't really know which) and makes a nice counterpart to a plate of sirloin tips in a surf'n'turf. The salmon is as good a filling for this as the shellfish.
A nice match for this would be rice pilaf with spinach; it's how Jimmy's serves it. Also, if your salmon skinning skills are not up to par, the part left behind when you slice the skin away can be scraped off to make sashimi.
This recipe makes one large pie, enough to serve about three people. You may feel free to subdivide it and make it in small individual baking dishes the way most restaurants I've seen do it.
I recommend a chilled white wine (a Riesling would work nicely) or a Pilsener/Kölsch-type beer with this.