Mix the drained pasta with the dressing and balsamic first so the pasta will absorb the flavors.
Next, add the chicken, black olives and green onions and mix well. Then add the seasonings and mix well.
Lastly, lightly toss the feta and tomatoes in the mix (save about a half cup to sprinkle on the top for serving).
The pasta will look like it's pretty liquidy but after you chill for least 3 hours, the pasta will absorb the liquids.
Serve and enjoy!