Preheat oven to 400F. Place freshly cut broccoli florets in a Ziploc bag. Pour the olive oil into the bag and shake well to coat the florets thoroughly. Add salt and pepper to taste and shake again. The broccoli will take on a slightly darker color as the oil soaks into the florets.

Lay the broccoli out on a baking sheet, placing the florets face up to ensure that the heads cook consistently. Roast in the oven for 20–30 minutes, or until the tops begin to crisp up and turn slightly golden.

Remove from the oven and let cool for 5 minutes before serving.