Traditional Irish Colcannon, A Creamy Mashed Potato with Kale -

Ingredients

• 1 ½ pounds Russet potatoes
• 4 tablespoons unsalted butter
• 1 cup whole milk
• 2 cups finely shredded Napa cabbage
• 2 cups finely shredded red kale
• 2 cups sliced leeks, ½ inch slices, pale green and white parts only
• 1/8 teaspoon ground nutmeg
• 1 ½ teaspoon kosher salt
• ½ teaspoon ground black pepper