Preheat the oven to 400°F
Trim/clean the Brussels sprouts, then cut them in half.
In a large bowl, toss Brussel Sprouts with olive oil, salt and a pinch of pepper. Stir to coat thoroughly.
Transfer the Brussel Sprouts to a baking sheet and roast for about 30 minutes. Be sure to keep shaking the pan every 5 minutes for even browning.
Increase the temperature to 450°F and continue roasting until the outer leaves are browned and crispy, another 7-10 minutes.