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