Roasted Brussels Sprouts are easy to prepare, with simple seasonings and Parmesan to boost their flavor and a natural sweetness brought out by roasting!
Place rack in center position of oven. Preheat oven to 400°F. Trim each Brussels sprout by cutting off a small piece of the end and then cut sprout in half, lengthwise.
Place Brussels sprouts in a large bowl (or a gallon-sized plastic bag). Drizzle with olive oil and sprinkle with garlic powder, salt, and pepper. Gently toss Brussels sprouts (or shake in bag) until evenly coated with oil and seasonings.
Spread out Brussels sprouts in a single layer on a large rimmed baking sheet. Roast for 25 to 35 minutes, flipping every 10 minutes. Watch closely as the end of the cooking time nears. Brussels sprouts are done when they have crispy, golden brown exteriors and tender interiors. Taste (but blow on it first...it will be hot!) and add more salt and pepper, if necessary. Transfer Brussels sprouts to a serving bowl, sprinkle with grated Parmesan, and toss to coat. Serve warm.