Ingredients
1 tablespoon extra-virgin olive oil
1 medium red onion, halved and thinly sliced
1/2 pound sweet Italian sausages, casings removed
1/2 teaspoon red-pepper flakes
4 cups reserved Three-Cheese Macaroni
2 tablespoons heavy cream
5 ounces baby spinach (about 5 cups), washed
Shredded Parmesan, for serving
Preparation
In a large nonstick skillet, heat olive oil over medium. Add red onion and cook, stirring occasionally, until softened, about 8 minutes. Add sausages and red-pepper flakes and cook, breaking up meat with a wooden spoon, until browned and cooked through, 8 minutes. Add reserved macaroni and cheese to skillet, gently stirring to combine. Stir in heavy cream and spinach, and cook until spinach begins to wilt, 4 minutes. To serve, sprinkle with Parmesan.
