Spaghetti with Spinach and Ricotta

1. 1

   Heat the olive oil in a large skillet over moderately high heat.

2. 2

   Add the onion and cook, stirring occasionally, until softened, 6 to 8 minutes.

3. 3

   Stir in the red pepper flakes, then add the spinach and cook, stirring, until just wilted, about 3 minutes.

4. 4

   Add the ricotta and lemon zest and season with salt and pepper.

5. 5

   Keep warm over very low heat.

6. 6

   Meanwhile, cook the spaghetti in a large pot of boiling well-salted water until al dente.

7. 7

   Set aside 1 cup of the pasta cooking water, and then drain the spaghetti well.

8. 8

   Add the spaghetti to the skillet and toss to coat, adding some of the pasta cooking water to loosen the sauce as needed.

9. 9

   Serve immediately.

* Per serving · 4 servings · Values may vary.