Remove the leaves and thick stem of the cauliflower. Wash and dry thoroughly.
Use the medium holes of a box grater to shred the cauliflower. Alternatively, cut the cauliflower into large chunks and blend in a food processor (in batches) until the texture resembles rice.
In a large skillet, melt the butter over medium heat. Add garlic and cook for 30 second or until fragrant.
Add cauliflower and cook for 6-8 minutes, or just until tender but not mushy.
Season with salt and pepper. Stir in chopped parsley (if using).
Notes
Store leftover cauliflower rice in the refrigerator for up to 4 days, or in the freezer for up to 2 months.
To make ahead, refrigerate or freeze cauliflower rice after grating and before cooking.
Dry washed cauliflower thoroughly to keep the texture light and fluffy.