Steps
1. Preheat your oven to 400°F (200°C).
2. In a bowl, toss the halved Brussels sprouts with olive oil, minced garlic, salt, and pepper.
3. Spread the Brussels sprouts on a baking sheet in a single layer.
4. Roast for 20-25 minutes, turning halfway through, until crispy and golden brown.
5. Remove from oven and immediately toss with grated Parmesan cheese and chili flakes if using.
6. Serve warm as a savory appetizer.