1. Preheat oven to 500°.
2. Place a large baking sheet in oven. Heat 5 minutes.
3. While pan heats, place cauliflower in a large bowl. Drizzle cauliflower with oil; toss until coated. Sprinkle with pepper and salt; toss well. Spread cauliflower in a single layer on hot pan.
4. Bake at 500° for 12 minutes or until browned and tender. Transfer cauliflower to a bowl. Add sage and lemon rind; toss well. Serve immediately.