Preheat the oven to 400ºF. Place the chopped broccoli on a large baking sheet, and drizzle it with the olive oil.
Use a microplane to mince the garlic over the broccoli, and season generously with salt and use your hands to toss it together evenly. (You can leave out the garlic if you don't care for it.) Spread the broccoli evenly into a single layer on the pan, then place it in the oven.
Roast until the broccoli is golden and tender, about 15 to 20 minutes, then serve warm.