01 - Preheat oven to 400°F (200°C).
02 - Slice the top off the garlic head to expose the cloves. Drizzle with olive oil, wrap in foil, and roast for 30-35 minutes until soft and golden.
03 - Steam or boil cauliflower florets until fork-tender, about 10-12 minutes. Drain well.
04 - Unwrap roasted garlic and squeeze out cloves into a large bowl.
05 - Add cooked cauliflower, butter, milk or cream, salt, and pepper. Mash until smooth using a potato masher or blend with an immersion blender for a creamier texture.
06 - Fold in chopped chives. Taste and adjust seasoning as needed.
07 - Serve hot, garnished with additional chives if desired.