Preheat your oven to 200°C (400°F). Rinse the broccoli and cut it into bite-sized florets, then spread them evenly on a baking sheet.
Peel the garlic cloves and smash them gently with the side of a knife to release their fragrant oils. Leave the cloves whole or roughly chop for a more intense flavor.
Drizzle the broccoli with olive oil, then toss gently with your hands or tongs until each piece is lightly coated, ensuring an even layer of oil for crispy edges.
Scatter the garlic cloves over the broccoli, distributing them evenly so they roast and caramelize alongside the vegetables.
Place the baking sheet in the oven and roast for about 20-25 minutes, flipping the broccoli halfway through. You’ll notice the edges getting charred and crispy, and the garlic turning golden and fragrant.
Remove the broccoli from the oven once the edges are deeply charred and the garlic is caramelized. Transfer to a serving dish if desired.
Squeeze fresh lemon juice over the hot broccoli and garlic, then sprinkle with flaky sea salt. Toss gently to combine, allowing the flavors to meld and the garlic to ooze into the vegetables.
Serve immediately to enjoy the smoky, fragrant aroma and crispy, tender bites of broccoli with caramelized garlic.