Crush the chopped parsley, garlic, salt, and a generous grinding of pepper in a mortar with a pestle to form a smooth paste. Add the nuts and pound again. Finally, add the cheese. When the mixture is smooth, gradually add the olive oil. The finished sauce should be fairly thick.
This can also be made in a blender. Put all the ingredients, except the cheese, into the container and blend until the mixture is smooth. Pour the sauce into a bowl and mix in the finely grated cheese.
© 1999 Jennifer Paterson. All rights reserved.