If using frozen cauliflower, break up any frozen clumps, but do NOT defrost.
Mound cauliflower rice in the center of a sheet pan coated with non-stick cooking spray.
Sprinkle garlic and drizzle olive oil over the top of the cauliflower rice and toss to combine. (I use my hands!)
Spread cauliflower rice into an even layer on the sheet pan.
Roast cauliflower rice in the oven for about 20 minutes, turning the rice half-way through with a spatula or large spoon. If cooking from frozen, it will take about 25 minutes.
Remove cauliflower rice from oven to serving bowl, scraping up all the browned bits on the pan.