How to Make It
Heat the oil in a large skillet over medium heat. Add the potatoes and fennel, season with ¾ teaspoon salt and ¼ teaspoon pepper, and cook, tossing occasionally, until golden and tender, 15 to 20 minutes.
Add the kale and cook, tossing occasionally, until wilted, 8 to 10 minutes more. Serve with the hot sauce.