This Riced Cauliflower is a great low-carb alternative to rice!
[My 2 Cents]
The easiest way I found (and a tip from Natasha) is to grate the cauliflower in a food processor until broken down into rice-sized pieces. This was super simple and worked perfectly. If you don't have a food processor, another option would be to grate it on a cheese grater. *Only grate the actual cauliflower. Discard the leaves and the stem.
Adapted from My friend, Natasha W