On a baking sheet, toss the cauliflower florets and unpeeled garlic cloves with olive oil, ensuring they're well coated.
Roast the cauliflower and garlic in the oven for about 25-30 minutes, or until the cauliflower is tender and slightly golden, and the garlic is soft.
Once roasted, remove from the oven and allow the garlic to cool slightly. Carefully squeeze the roasted garlic out of its skins and into a large mixing bowl with the cauliflower.
Add the cream cheese, almond milk, onion powder, black pepper, and salt to the bowl.
Using a potato masher or an immersion blender, mash and blend the ingredients together until smooth and creamy. Adjust the consistency with more almond milk if necessary.
Taste and adjust salt and seasoning to your preference.
Transfer the mashed cauliflower to a serving dish and garnish with chopped fresh chives.
Notes
Adjust the consistency with more almond milk if necessary.