Preheat oven to 425°F
Wash and dry the cauliflower
Remove leaves and trim the stem
Cut cauliflower into bite-sized florets
Place florets in a bowl
Add olive oil, salt, and pepper
Toss until evenly coated
Spread florets on a baking sheet in a single layer
Roast for 20 to 25 minutes
Flip halfway through cooking
Roast until golden brown and tender
Serve immediately