Preheat oven to 400 F and line a baking sheet with parchment paper for easy cleanup. Prep your sprouts by removing the ends and any yellow or faded outer leaves, then slice them in half.
Place brussels sprouts in a bowl with oil, salt, and pepper. Toss to combine. Place on prepared baking sheet in a single layer, making sure to leave enough space between the veggies so they can roast evenly.
Bake in preheated oven until thy sprouts are caramelized on the outside and soft on the inside. Serve warm and enjoy.