Creating Garlic Parmesan Roasted Brussels Sprouts is simple and straightforward. Follow these steps for scrumptious results:

1. Preheat Oven: Preheat your oven to 425°F (220°C) for optimal roasting.
2. Prep Brussels Sprouts: Rinse the Brussels sprouts and trim the ends. Slice each sprout in half lengthwise.
3. Mix Ingredients: In a large bowl, combine the halved Brussels sprouts with olive oil, garlic, salt, black pepper, and red pepper flakes. Toss well to coat all the sprouts evenly.
4. Arrange on a Baking Sheet: Spread the mixture out in a single layer on a large baking sheet. Ensure they aren’t crowded for proper roasting.
5. Roast: Place the baking sheet in the preheated oven and roast for 15-20 minutes. Halfway through, give them a good stir to ensure even cooking and browning.
6. Add Parmesan: When they are golden and tender, remove the sheet from the oven. Sprinkle grated Parmesan cheese over the Brussels sprouts, and return to the oven for an additional 2-3 minutes until the cheese is melted and bubbly.
7. Finish with Balsamic (Optional): If you like, drizzle balsamic vinegar over the hot sprouts before serving for an extra layer of flavor.
8. Serve Hot: Enjoy the Brussels sprouts warm, straight from the oven, as a side or as a delicious snack.

These precise steps will guide you through the process of creating this incredible side dish.