Cooking cauliflower couscous: Cooking makes the cauliflower more tender and rice-like. Warm a tablespoon of olive oil or butter in a large skillet over medium heat. Stir in the couscous and sprinkle with a little salt. Cover the skillet and cook for 5 to 8 minutes, until the couscous is as tender as you like. Use or serve immediately, or refrigerate the couscous for up to a week.