potato knish, two ways

Ingredients in this Recipe

1 1/2 pounds medium red potato (about 3 to 4), peeled and quartered
1 big leek (about 1/2 pound), white and light green parts only, halved lengthwise, and thinly sliced (you’ll clean the grit out in a moment)
1 generous cup lacinato kale ribbons (about 3 ounces or 1/4 to 1/3 bundle), tough stems and ribs removed and leaves cut into strips (you’ll wash it in a moment)
1 tablespoon unsalted butter
1 tablespoon vegetable or olive oil
1/2 teaspoon table salt
3 ounces cream cheese, at room temperature
Freshly ground black pepper