Measure the couscous into a medium-sized bowl. Add the boiling water, stir just to mix, then cover with a plate or saucepan lid, and let it sit for 15 minutes.
Meanwhile, in a large bowl, combine the sliced zucchini, red pepper, chickpeas and onion. In a small bowl, stir together the yogurt, mayonnaise, curry powder and salt.
When the couscous has absorbed all the water, fluff it with a fork to separate the granules. They should be tender but not mushy or stuck together. Add to the vegetables in the bowl and toss gently to mix. Stir in the yogurt mixture - add ½ of the mixture at a time (you may not want to use all the dressing). Mix well, then cover with plastic wrap (or transfer to a covered container), and refrigerate for at least 1 hour or until ready to serve.
Sorry, there is no nutrition information available for this recipe.