Pre-heat oven to 425.
Microwave cauliflower for 5 minutes (or until unfrozen).
Toss cauliflower with olive oil, salt, pepper, garlic powder.
Add nutritional yeast and toss.
Cover cookie sheet with parchment paper. Spread out cauliflower in single layer. Sprinkle with additional nutritional yeast.
Bake for 10 minutes. Turn. Bake for additional 5-10 minutes.