Pre-heat oven to 400°.
Wash the sprouts and trim the core (about 1/4 inch from the end)
Remove the outer leaves from the sprouts.
Place Brussels sprouts olive oil, salt, and pepper in a reusable plastic bag.
Seal and knead bag to coat the sprouts
Lightly grease a cookie sheet with olive oil.
Place marinated Brussels sprouts onto the baking sheet.
Roast in oven oven 25 minutes, turning over sprouts halfway through for even cooking.
You can also spritz with a little balsamic vinegar before serving for added flavor.