Rice the cauliflower by grating it on the larger holes on a grated or in a food processor.
Heat the oil in a large pan or pot over medium-high heat; add garlic and stir for less than 1 minute then add the cauliflower and cook, stirring occasionally, until the cauliflower rice is tender and slightly golden brown, about 6-9 minutes.
After the rice is cooking squeeze the juice of 1 lime on to the rice, add the chopped cilantro and gently combine. Serve immediately while the cilantro is still fresh. If you are saving rice for later or another day, leave that portion without cilantro and add the cilantro right before serving.