01 - Preheat oven to 425°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Place Brussels sprouts in a large bowl. Drizzle with olive oil and sprinkle with salt, pepper, and garlic powder. Toss thoroughly until each piece is evenly coated.
03 - Spread the seasoned Brussels sprouts across the prepared baking sheet in a single, even layer. Scatter diced beef bacon evenly over the top.
04 - Roast for 20 to 25 minutes, stirring halfway through cooking time. The Brussels sprouts should be golden brown and tender, while the beef bacon reaches crispy texture.
05 - Remove from oven and transfer to a serving dish. Garnish with chopped parsley and grated Parmesan cheese if desired. Serve immediately while hot.