
A classic sauce from Argentina and Uruguay that is typically served with grilled meat, chimichurri packs in the flavor no matter what you add it to.
In a food processor, pulse parsley, garlic, and oregano until herbs and garlic are finely chopped. (This can also be done by hand with a chef's knife.)
Transfer parsley mixture to a medium bowl and stir in oil, vinegar, lemon zest (if using), and red pepper; season with salt.