Kale seems to have become the vegetable of the moment, which is good news for kale lovers like me. In this mac and cheese, the hearty vegetable appears two ways: mixed into the casserole and also as a crispy topping. Because of this, it almost seems like it’s two different vegetables, which makes this not only delicious but also fun to eat.
From Mac & Cheese, Please! 50 Super Cheesy Recipes by Laura Werlin/Andrews McMeel Publishing, LLC.
Preheat the oven to 375 degrees. Coat the inside of an 8-inch square (1½-quart) baking dish or pan (or six 8-ounce ramekins) with olive oil. Set aside.
Fill a 4- to 5-quart pot about 3/4 full with water and add 1 tablespoon of the salt. Bring to a boil and add the pasta. Cook, stirring once or twice, until tender but firm, about 8 minutes, and drain. Reserve the pot.
To prepare the kale, remove the stems. Cut 4 whole leaves into quarters and coarsely chop the rest. In a large skillet, heat 2 tablespoons of the oil over medium heat. Add the onion and cook for 5 minutes, or until soft. Add the chopped kale and garlic and cover and cook, stirring occasionally, until the kale is tender, 5-7 minutes. Stir in the red pepper flakes and ½ teaspoon of the salt and set aside.
Place the quartered kale leaves in a small bowl. Toss with 1 tablespoon of the olive oil, 1/2 the pecorino, and salt and black pepper to taste. Set aside.
Using the same pot you used to cook the pasta, heat the remaining 2 tablespoons oil over medium heat. Slowly whisk in the flour and stir constantly until a paste forms, 30-45 seconds. Continue stirring for 1-2 minutes, until the mixture starts to darken slightly and smell a bit nutty. Slowly whisk in the milk, cream, and the remaining ¾ teaspoon salt and cook until the mixture starts to thicken and is just beginning to bubble around the edges, 5-7 minutes. It should be thick enough to coat the back of a wooden spoon. Add 3 cups of the fontina, the remaining pecorino, the cayenne, and nutmeg and stir until the sauce is smooth but not too runny. It should be similar in texture to cake batter. If it’s soupy, continue cooking until it thickens.
Add the pasta and chopped kale mixture, and stir to combine. Pour into the prepared baking dish. Sprinkle the remaining fontina on top. Distribute the quartered kale leaves over the top. Place the dish on a rimmed baking sheet and bake until bubbling and golden brown, about 30 minutes. Let cool for 15 minutes before serving.