For the most authentic flavor, use a mortar and pestle to make the pesto. The grinding action releases the basil's oils differently than a food processor. If trofie pasta is unavailable, substitute with linguine, fettuccine, or any other fresh pasta shape. Adjust the amount of cheese and olive oil to your personal preference. Pesto is best when used immediately. If storing, press a piece of plastic wrap directly onto the surface of the pesto to prevent oxidation and discoloration. Store in the refrigerator for up to 3 days.