Preheat oven to 425°F (220°C). Separate cauliflower into florets. Toss with oil and spread out on a baking sheet. Sprinkle with chili powder, cumin, salt and pepper, then toss to coat. Roast for 20 to 30 minutes, stirring once or twice, until tender and golden.
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.