Boil a nice pot of water, salt to your liking, and throw in the pasta.
While it is cooking, heat the Rustichella d'Abruzzo Genovese pesto in a pan. If necessary, dilute the pesto with a few tablespoons of boiling water from the pasta. Once the tagliatelle is cooked, drain it well and transfer it to the pan with the pesto, mix well. Serve on a plate.