Cooking cauliflower rice depends on how you are going to use it.  I like to toss it in a pan with little butter till the raw smell is gone and it is tender. Cook for around 5-6 minutes and then at the end season the rice. Another way of cooking Cauliflower rice is to microwave it for 4-5 minutes. Then I sometimes put the rice in a strainer/muslin cloth to squeeze extra liquid.