The classic! So easy yet elegant. Make extra. The pesto can be used in a variety of ways, for example, put a dab in minestrone soup, or use as a filling for tortelloni.
Use a food processor to combine the basil, pine nuts, Parmesan, garlic, and the salt. Puree everything. While the motor is still running, drizzle the olive oil in.
Season with pepper to taste.
Toss immediately over hot pasta.