There are quite a few ways to make cauliflower rice. This is my favorite way to do it. It isn't really that flavorful but when added to dishes it gives it a great texture.
Pulse a whole head of washed and chopped cauliflower in a blender or food processor.
I used my vitamix and had to stop a few times to scrape down the sides. You want it to look like rice.
Melt some fat in a pan. Most of the time I use coconut oil but anything would be good. Add your "rice" and any seasoning. This time around I added taco seasoning and a little salt.
Saute in the fat until tender. Mine takes about 10 minutes.