Preheat the oven to 425°F (220°C)
Line a baking sheet with parchment paper
Wash and dry the cauliflower
Remove the leaves and core
Cut the cauliflower into florets
Place the florets in a large bowl
Add olive oil
Add salt
Add black pepper
Add garlic powder or other desired seasonings
Toss until evenly coated
Spread the cauliflower in a single layer on the baking sheet
Roast for 20 to 30 minutes
Flip the florets halfway through roasting
Roast until golden brown and tender
Serve immediately