Preheat your oven to 400°F (204°C) and line a baking sheet with parchment paper for easy cleanup.
Spread the broccoli florets on the prepared baking sheet. Drizzle with olive oil and season with sea salt and black pepper. Toss to coat evenly and arrange in a single layer.
Roast in the preheated oven for 15 to 22 minutes, or until the broccoli is tender and the edges are crisped to your liking. For a spicy kick, sprinkle with red pepper flakes after roasting.