Combine. Whisk all of the ingredients together until combined.
Season. Taste and season with additional salt, pepper and/or vinegar if needed.
Serve. Serve immediately and enjoy!
Notes
Storage instructions: Leftover chimichurri can be stored in an airtight container in the refrigerator for up to 5 days. For best flavor, let it come to room temperature and give it a good stir before serving, as the oil may solidify slightly when chilled. You can also freeze chimichurri in small portions (like an ice cube tray) for up to 3 months -- just thaw as needed.