Over the years, i've canned hundreds and hundreds of pounds of salmon that i have caught. I always put in a heaping tsp of yellow mustard and a pinch of salt in with it.
When i open the cans, or jars (depending on which one i've canned it in) i use it as i would canned tuna, and it's quite good... I've done it many different ways though, it's all in what YOU like.
DM
BTW, you can put a castiron trivit on a turkey frier, under the p. cooker, to lower the temp a bit...