Preheat your oven to 220°C (430°F) and line a large rimmed baking sheet with parchment paper or lightly oil it.
Wash and cut the broccoli into uniform, bite-sized florets, making sure they’re dry before tossing.
Place the broccoli in a mixing bowl and drizzle with olive oil. Toss well to coat all the pieces evenly with oil.
Spread the broccoli out in a single layer on the prepared baking sheet, leaving space between florets for crisping.
Scatter thin slices of garlic evenly over the broccoli. Sprinkle with salt and pepper, then roast in the oven for 20-25 minutes, tossing halfway through, until edges are deeply golden and crispy.
Once roasted, remove from the oven and immediately sprinkle with freshly grated Parmesan cheese. Toss gently so the cheese melts into the hot florets.
Finish with a squeeze or zest of lemon for brightness, then give everything one last gentle toss.
Serve immediately, showcasing the crispy, caramelized edges and cheesy topping—perfect for a flavorful veggie side.