01 - Set the oven to 425°F and line a large baking sheet with parchment paper.
02 - In a large bowl, combine broccoli florets, olive oil, sliced garlic, sea salt, and black pepper. Toss until evenly coated.
03 - Spread the broccoli mixture in a single layer on the prepared baking sheet, ensuring there is space between florets to avoid overcrowding.
04 - Place the baking sheet in the oven and roast for 18 to 20 minutes, flipping the florets once halfway through roasting until edges are crisp and broccoli is tender and golden.
05 - Remove the broccoli from the oven and immediately sprinkle with grated Parmesan cheese. If using, drizzle lemon juice and scatter lemon zest, then toss gently to combine.
06 - Serve the roasted broccoli hot as a flavorful side dish.