Spinach and Walnut Spaghetti

Directions

1. 1
   In a large heavy skillet, heat the oil over medium heat until hot.
2. 2
   Stir in the garlic, 1/2 teaspoon each salt and pepper, and cook, stirring occasionally, until the garlic is golden, about 2 minutes.
3. 3
   Stir in the spinach and pepper flakes and cook, turning with tongs, until the spinach is wilted, about 4 minutes.
4. 4
   Remove the skillet from the heat.
5. 5
   In a large pot of boiling salted water, cook the spaghetti until al dente.
6. 6
   Reserve 1/2 cup of the pasta cooking water, then drain the pasta.
7. 7
   Toss the pasta with the spinach mixture in the skillet along with 1/4 cup of the pasta cooking water.
8. 8
   Add more pasta cooking water for a thinner sauce, then season with salt and pepper to taste and serve topped with the walnuts.