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This one's a bit fancy but why not? The dressing ingredients are a bit of an investment the first time, but they go a long way: now that I have them, anytime I have a craving for this, I just need to go get fresh salmon and cucumber (I couldn't find spring onions the first time so I got a jar of dry-frozen chives – they work just as well and will last a while). I can easily make a dozen salads before I run out of anything else.
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makes a good point about ensuring your fish is fresh before you eat it raw; personally I use my nose, but don't take my word for it, make sure it's proper to eat without cooking!
More recipes in my folder: Quick Food, Not Fast Food