Slice cauliflower and transfer to a food processor. Pulse until very finely chopped. Transfer to a microwave-safe bowl and season with salt, pepper, and nutmeg. Stir to combine.
Microwave the cauliflower rice at full power for approx. 3 - 4 min. Stir and transfer to a serving bowl. Season to taste with salt and pepper and top with butter. Enjoy with recipes like our Mexican mole chicken!