Roast the Garlic: Preheat your oven to 400°F (200°C). Carefully slice the top off the whole head of garlic, exposing the individual cloves. Drizzle a small amount of olive oil over the exposed cloves, then wrap the head in aluminum foil. Place it in the oven and roast for 30-35 minutes, or until the cloves are soft and caramelized. Once done, remove from the oven, allow it to cool slightly, and then squeeze the roasted cloves out of their skins into a bowl. Set aside.
Cook the Potatoes: In a large pot, place the cubed Yukon Gold potatoes and cover them with cold water. Season the water liberally with salt to enhance the flavor of the potatoes. Bring the pot to a rolling boil over medium-high heat, then reduce the heat to a gentle simmer. Cook the potatoes for about 15-20 minutes, or until they are fork-tender.
Drain and Mash: Once cooked, drain the potatoes thoroughly and return them to the pot. Using a potato masher, mash the potatoes until they reach a smooth consistency, free of lumps.
Combine Ingredients: Add the roasted garlic cloves, softened butter, and heavy cream (or milk) to the mashed potatoes. Stir everything together until the mixture is creamy and well combined. If needed, adjust the texture by adding more cream or milk until you achieve your desired consistency.
Season to Taste: Taste the mashed potatoes and season with salt and freshly ground black pepper according to your preference. Stir again to ensure the seasoning is evenly distributed.
Serve: Spoon the creamy mashed potatoes into a warm serving bowl. Finish by sprinkling the chopped chives on top for a vibrant burst of color and flavor.
Notes
For an elegant touch, create a swirl in the mashed potatoes and garnish with extra chives.