Bring a large pot of salted water to a boil. Add the potatoes and cook for 15–18 minutes, or until fork-tender. Drain the potatoes thoroughly and return them to the warm pot for 1–2 minutes to remove any excess moisture. Add the butter and roasted garlic to the potatoes, allowing the butter to melt. Mash the potatoes until smooth using a potato masher or ricer. Gradually pour in the warm milk while stirring until the potatoes become light and creamy. Stir in The Holly Tree Organic White Pepper Powder and Salt, mixing until evenly combined. Taste and adjust the seasoning if needed. Transfer to a serving bowl and garnish with freshly chopped parsley and a light sprinkle of The Holly Tree Organic White Pepper Powder before serving.