Serve with a Greek-style salad or pasta salad, over sliced tomatoes, or as a dip for crudités.
Combine in a blender:
Blend until smooth. With the machine running, add in a slow, steady stream, blending until smooth:
If the dressing is too thick, add a little more milk as needed. Taste and adjust the seasonings. Use immediately, or cover and refrigerate for up to 5 days.