Add all ingredients to a food processor and puree until blended but still has some texture, about 20-30 seconds. Use immediately or store in an air tight container in the fridge for up to 1 week or freeze for up to 1 month.
Recipe Notes
Romano is a little stronger and saltier than parmesan and a nice addition, however you can use all parmesan if desired.
You can also use a blender or mortar and pestle if desired.