Preheat oven to 450 °F (232°C).
Roast the vegetables. Spray an 18 x 13-inch rimmed baking sheet. Place the red onion, carrots, zucchini, and red pepper on the baking sheet.
Coat vegetables with 1 TBSP of olive oil and season with salt, tossing to mix evenly.
Roast vegetables for 15 minutes until tender, tossing once halfway through.
Make the dressing. While vegetables are roasting, in a small bowl whisk together 3 TBSP olive oil, lemon juice, garlic, cumin, coriander, and season with 1/4 salt, set aside.
Make the couscous. In a medium sauce pan, bring the water (or broth), 1/2 tsp salt, and tumeric to a boil. Take the saucepan off the burner and add the couscous and raisins, stir. Cover and let stand for 5 minutes. After the couscous has cooked, take a fork and gently fluff.
In a large bowl, add the couscous, roasted vegetables, dressing, chickpeas, almonds, and parsley to couscous and toss to evenly coat.