Colcannon (Irish Mashed Potatoes)

Bahan-bahan (6 porsi)

• 3 pounds Russet potatoes, peeled or unpeeled
• fine sea salt and freshly-ground black pepper
• 1 bay leaf
• 5 tablespoons butter, divided
• 4 cloves garlic, pressed or minced
• 4 cups (~2.5 ounces) loosely-packed chopped kale, tough stems removed
• 4 g reen onions, thinly sliced and divided
• 4 ounces cream cheese, room temperature
• 1/2 cup whole milk