Warm up the olive oil in a frying pan on medium heat.
As soon as it is warm, add the garlic clove, finely chopped anchovies, capers, and crushed red pepper flakes, and reduce the heat to medium-low.
Allow the ingredients to gently fry and flavor the oil. This will take 3-4 minutes.
As soon as the garlic clove turns lightly golden, add the tomato sauce to the pan, and allow it to reach a light simmer, stirring occasionally.
In the meantime, cook the pasta according to package directions in a large pot of boiling salted water.
After the sauce has been simmering for about 10 minutes, add the olives and chopped parsley.
Mix the sauce well and adjust the seasoning if required. As anchovies, olives, and capers are quite salty, do not add salt and pepper before this step.
Remove the whole garlic clove from the sauce.
Once the pasta is ready (al dente), remove a cup of cooking water and set it aside, before draining the rest.
Add the pasta to the puttanesca sauce, and mix well. If necessary, add some of the pasta cooking water to adjust the consistency.
Your pasta puttanesca is now ready to be served with your favorite side salad or a nice warm slice of garlic bread. Enjoy!