1. Wrap beets in foil, and bake in a 450 degrees oven for 30 to 60 minutes, until tender when pierced with tip of a knife. Unwrap, let cool enough to handle, and peel. Cut the beets into 1/2-inch pieces, and set aside.

2. Spray a nonstick skillet with cooking spray. Add onion and cumin, cover, and cook, stirring, over medium-low heat until translucent, 6 to 8 minutes. Add couscous, boiling water, salt, and pepper; stir. Turn off heat, cover, and let sit 15 minutes, until fluffy when mixed with a fork. Transfer to large bowl, add remaining ingredients, and toss.