Stir in the zuchinni, garbanzo beans, and raisins. Cover and continue cooking until the squash is tender, about 5 to 10 minutes. Make the couscous: Meanwhile, in a large saucepan, combine the water, oil, and salt and bring to a boil over high heat. Stir in the couscous. Immediately remove from the heat, cover, and let stand until the couscous has absorbed all the liquid, about 5 minutes. Place the couscous on a warmed serving platter and make a well in the center. With a slotted spoon, spoon the vegetables into the well. Pour the tangine cooking juices over the couscous, sprinkle with the almonds, and serve.