Kathleen's Black Bean and Couscous Salad

I was skeptical about this salad at first, but it is good you guys! The only changes I made to this recipe were that I used whole wheat couscous (from Trader Joe's), 1 can of black beans (I love black beans, but not that much), and only 5 green onions (my bunch came with 6 and I saved one for next week's recipe). Some reviewers said to make a double batch of dressing but I made a single batch and it tasted just fine. It has an interesting mix of textures and I love anything "southwesterny." But beware, it makes a ton! That 8-10 servings bit is no joke!