Separate the cauliflower head into florets, discarding the stems and leaves for a cleaner, lighter texture. Using the large holes of a grater, grate the florets to create coarse cauliflower rice.
In a skillet, heat olive oil over medium heat until it shimmers. Add the minced garlic and sauté briefly for about 1 minute until fragrant, being careful not to let it brown.
Add the grated cauliflower rice to the skillet and cook for 4 to 5 minutes, stirring occasionally, until the cauliflower becomes tender but still slightly firm, resembling the texture of rice.
Stir in the zest and juice of the lemon, adding a fresh, tangy note. Sprinkle in the parsley, salt, and black pepper, combining everything well to ensure a harmonious blend of flavors.
Serve the cauliflower rice immediately for the best flavor, or allow it to cool completely before storing it in an airtight container in the fridge. It will stay fresh for up to 5 days.