Place all ingredients EXCEPT the olive oil in a blender. Pulse until smooth.
To avoid the olive oil becoming bitter, measure it out into the blender's bowl and whisk by hand until emulsified. The heat from the blender's blades can otherwise turn the olive oil bitter.
Alternatively, you can pour out the content of the blender into the container you will store your dressing in, add the oil, close and shake vigorously
Notes
This dressing will keep for a week in your refrigerator.