Serve this classic basil pesto with freshly cooked pasta. It also serves to prepare a vinaigrette and flavor a pistou soup.
Place all the ingredients except Parmesan cheese in the food processor and pulse a few seconds to get a fairly smooth sauce with still very small pieces of herbs and nuts. Stop the device 2 times and scraped with a spatula.
Add the Parmesan and pulse 2 to 3 times not more.
Pesto Pasta: bring the water to boil to cook the pasta and reserve in a bowl some spoonfuls of water before it starts to boil. While pasta cooks, add the lukewarm water to the pesto to make it a little more fluid.
As soon as the pasta is cooked, drain and distribute into the plates or service bowls. Immediately pour 3 to 4 spoonfuls of pesto on each portion and quickly mix with 2 forks or tongs.