Place all ingredients EXCEPT the water in a small food processor or blender and process until blended.
Check the dressing for consistency. If you like it thicker you're probably done, but if you like it thinner, add a bit of water and process again. Repeat until you get it just like you like it. The dressing will get a little thicker as it sets.
Refrigerate until ready to serve, at least 12 hours.
Stir before serving.
Notes
Use freshly-grated Parmesan cheese for the best results.Need ideas for putting together the ultimate salad? Check out my salad inspirations!