Cook pasta in a large pot of boiling water, according to package instructions, until tender. Drain pasta and rinse well with cold water.
Mix dressing ingredients together and pour half of the dressing over the pasta. Toss to coat.
Add remaining ingredients and toss to combine. Add a little more dressing, to your liking (you may not want to use it all).
Refrigerate until ready to serve. Stir again before serving.
*you can substitute ¾ cup store bought Italian dressing