Preheat the oven to 400°F. Toss the cauliflower1 head florets with the 2 tablespoons olive oil2 tablespoons, cumin1 teaspoon, chili powder1/2 teaspoon, and garlic powder1/4 teaspoon. Spread on a baking sheet and roast for 20 to 25 minutes, tossing halfway, until tender and browned.