This is an improvisation on two recipes that I found on 'Zaar (#78690 and #211843). It makes a great summer dinner. You can substitute lowfat or nonfat sour cream for the mayo if you want something a bit lighter.
Cook pasta according to package directions; drain and chill by running it under cold tap water or, if you have time, putting it in a covered bowl in the refrigerator.
Combine the yogurt, mayo, dill, salt, pepper, brown sugar, lemon juice and tabasco until well-blended (I use a kitchen mixer for this).
Toss the dressing with the green onions, cucumber, salmon and pasta, (I use a mixer for this, too) and serve immediately.