Creating Spaghetti Puttanesca is simple when following these clear steps:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add spaghetti and cook according to package instructions until al dente. Reserve 1 cup of pasta water, then drain.

2. Sauté Garlic: In a large skillet, heat olive oil over medium heat. Add minced garlic and sauté until fragrant, about 1 minute. Be careful not to burn it.

3. Add Spice: Stir in the red pepper flakes, allowing them to infuse the oil for about 30 seconds.

4. Combine Tomatoes: Add the crushed tomatoes to the skillet. Stir well and let the sauce simmer for 5-7 minutes, allowing it to thicken.

5. Add Olives and Capers: Mix in the sliced olives and capers. Stir everything together and let it simmer for an additional 2-3 minutes.

6. Toss with Pasta: Add the drained spaghetti to the skillet with the sauce. Toss well to coat the pasta in the sauce. If the sauce seems too thick, gradually add reserved pasta water until you reach your desired consistency.

7. Season: Taste and adjust salt if necessary, ensuring the flavors are balanced.

8. Serve: Plate the pasta and garnish with freshly chopped parsley. If desired, sprinkle with grated Parmesan cheese for added flavor.