Pulse cauliflower or use a food processor to get the florets into rice size pieces. Note: add in a little at a time, or the cauliflower won’t process evenly.
When the oil is melted, add the onions and garlic. Cook until just translucent, then add the riced cauliflower. This is one time when overcrowding a pan and creating steam works to your advantage
Give it a couple minutes… and by a couple, we mean about 5-7, stirring occasionally. Then add in the lime zest and fresh cilantro. You may also want to add a bit of salt and pepper too; season to your preference. Mix together in the pan (enjoy the smell!) and transfer to a serving dish. Squeeze the fresh lime juice over the rice and serve.