Garlic Mashed Potatoes

Bahan-bahan (8 porsi)

• 4 lb Yukon potatoes (10 potatoes, peeled and quartered*)
• 1 1/3 cup whole milk
• 6 g arlic cloves (smashed)
• 8 Tbsp unsalted butter (softened)
• 1/4 cup sour cream
• 1 1/2 tsp fine sea salt
• 2 Tbsp chives (finely chopped, for garnish)