Pesto is a vibrant green sauce made from fresh basil, olive oil, Parmesan cheese, and pine nuts. It originated in the city of Genoa in the northwestern region of Italy, known as Liguria. The name pesto comes from the Genoese word pestâ, which means to pound or crush. In traditional pesto recipes, all of the ingredients are pounded together in a mortar and pestle until they form a smooth paste. However, these days most people prefer to use a food processor or blender to make pesto. While pesto is commonly associated with pasta, it can also be used as a spread or condiment for sandwiches, pizzas, and salads. For a truly authentic Italian pesto experience, try making your own at home using this fresh pesto recipe