Heat the oven: Set it to 425°F (220°C).
A hot oven is key for crispy edges.
Prep the broccoli: Rinse, dry well, and cut into medium florets. Include peeled, sliced stems—they roast beautifully.
Season on the pan: Spread the broccoli on a large sheet pan. Drizzle with olive oil, sprinkle with salt and pepper, and toss to coat.
Space everything out in a single layer for even browning.
Roast, then add garlic: Roast for 12 minutes, then quickly remove the pan and sprinkle the minced garlic over the broccoli. Toss gently and return to the oven.
Finish roasting: Roast 6–10 more minutes, until the florets have charred tips and the stems are tender. Total time is about 18–22 minutes.
Brighten it up: Zest half the lemon over the hot broccoli.
Squeeze on a little juice (start with 1–2 teaspoons), then taste and adjust salt and pepper.
Optional flair: Add a pinch of red pepper flakes for heat, a shower of Parmesan for richness, or a handful of toasted nuts for crunch.
Serve right away: Roasted broccoli is best hot off the pan when it’s crisp at the edges and tender inside.