The couscous will be even fluffier if steamed. To do this, bring the water, spices and salt to the boil in a saucepan. Place the couscous in a steamer insert and set this in the saucepan over the water. Reduce the heat to the lowest setting so that the water is just simmering very gently, and steam the couscous with the lid on for 20 minutes. Then transfer the steamed couscous to a bowl, fluff it up with a fork and stir in 1 tablespoon of olive oil; season with salt if required.