Kale Colcannon

Ingredients (8)

• 3 pounds Russet potatoes, peeled
• 2 teaspoons fine sea salt*, divided
• 2 tablespoons unsalted butter, divided, plus more for garnish
• 1 large bunch kale, preferably Tuscan/Lacinato, ribs removed and chopped into small, bite-sized pieces (3 to 4 cups)
• 1 medium clove garlic, pressed or minced
• 8 ounces cream cheese
• 4 ounces (1/2 cup) sour cream
• 3 tablespoons thinly sliced green onion, divided