Preheat the oven to 400°F to 425°F
Trim the Brussels sprouts and remove any yellow outer leaves
Cut larger sprouts in half
Pat the sprouts dry
Toss with olive oil, salt, and pepper
Spread in a single layer on a baking sheet
Place cut side down for better browning
Roast for 20 to 30 minutes
Flip halfway through if desired
Roast until tender and deeply browned
Add optional seasonings after roasting if desired