01 - Set oven to 400°F and prepare to roast garlic.
02 - Slice the top off the garlic bulb to expose cloves; drizzle with olive oil, wrap in foil, and roast for 30 to 35 minutes until soft and golden. Allow to cool slightly.
03 - Steam cauliflower florets over simmering water for 12 to 15 minutes until fork-tender.
04 - Squeeze softened garlic cloves from their skins.
05 - In a food processor or with a potato masher, blend steamed cauliflower, roasted garlic, butter, cream cheese, and milk until smooth and creamy.
06 - Add salt and freshly ground black pepper, adjusting to taste.
07 - Transfer to a serving bowl and garnish with chopped chives if desired. Serve warm.