Ingredients

  • 2 tablespoons extra-virgin olive oil
  • 1 yellow onion, finely chopped
  • Pinch of crushed red pepper flakes
  • 8 ounces baby spinach, chopped
  • 1 1/2 cups fresh ricotta
  • Finely grated zest of 1/2 lemon
  • Salt
  • Freshly ground black pepper
  • 8 ounces spaghetti

Method

  • Heat the olive oil in a large skillet over moderately high heat.
  • Add the onion and cook, stirring occasionally, until softened, 6 to 8 minutes.
  • Stir in the red pepper flakes, then add the spinach and cook, stirring, until just wilted, about 3 minutes.
  • Add the ricotta and lemon zest and season with salt and pepper.
  • Keep warm over very low heat.
  • Meanwhile, cook the spaghetti in a large pot of boiling well-salted water until al dente.
  • Set aside 1 cup of the pasta cooking water, and then drain the spaghetti well.
  • Add the spaghetti to the skillet and toss to coat, adding some of the pasta cooking water to loosen the sauce as needed.
  • Serve immediately.