Using a grater (large holes), break the cauliflower into rice-size chunks, directly into a large bowl. Take care not to get pieces of nails and flesh in there!
My wife prefers the food processor, pulse mode. It is much faster and safer although it does require more skill. Process it too much, you end up with a paste. Too little – you eat giant rice.
I use this mostly as a side dish for asian recipes, to replace rice. I serve it as if it is rice – either in a bowl from where everyone takes some in his own plate, or if I prepare each plate, just like I would prepare the plate with rice. Enjoy!