Toast the couscous before adding the broth. Two to three minutes of toasting adds a nutty depth to the finished salad that plain boiled couscous does not have.
Both the couscous and the squash need to be at room temperature before combining. Adding warm ingredients to the dressing causes it to break and become greasy rather than coating everything cleanly.
This salad is significantly better after 30 minutes of rest as the dressing absorbs into the couscous and the flavors meld together.
Pull from the refrigerator 20 minutes before serving if chilled. Cold couscous absorbs the dressing and tastes muted. Room temperature brings everything back to life.