Moroccan spices blend earthy (cumin) with warm and fragrant (coriander and allspice). Salmon and cauliflower embrace these flavors well. Look for thicker salmon fillets from the upper portion of the fish rather than thinner tail pieces.
Preheat oven to 450°F.
Combine olive oil, 1/2 teaspoon ground cumin, 1/4 teaspoon salt, and black pepper in a large bowl. Add cauliflower florets; toss well to coat. Arrange cauliflower in a single layer on a rimmed baking sheet; bake at 450°F for 18 to 20 minutes or until cauliflower is browned and tender. Combine the cauliflower mixture, cilantro, raisins, and lemon juice in a bowl; toss gently to combine.
Reduce oven temperature to 400°F.
Combine remaining 1/2 teaspoon cumin, remaining 1/2 teaspoon salt, coriander, and allspice in a small bowl. Rub spice mixture evenly over fillets. Arrange fillets, skin side down, on a foil-lined baking sheet coated with cooking spray; bake at 400°F for 10 minutes or until done. Serve with cauliflower mixture and lemon wedges.