Cook the rotini pasta according the package directions. Rinse with cool water for several minutes until pasta is no longer warm. Drain well.Meanwhile, combine all dressing ingredients in a small bowl and mix to combine. Set aside.Transfer cooled and drained pasta to a large mixing bowl. Add dressing and toss to combine. Add remaining pasta salad ingredients, through chicken (reserve Doritos for later) and mix until the ingredients are well incorporated. Cover and refrigerate until ready to serve.Top with crushed Doritos just before serving.