Prep the broccoli—Spread florets on baking sheet or roaster, drizzle with olive oil, and toss to coat evenly. Season with salt, pepper, and garlic.
Roast the broccoli—Roast until florets are lightly browned and tender when pierced with a fork, 15 to 20 minutes. Remove from oven and toss with lemon juice and basil. Transfer to platter and serve warm.