Combine all salad ingredients in a glass jar, seal tightly with a lid, then shake well, until thick and creamy. Taste, adjust seasoning, then serve immediately, or refrigerate until needed.
Add a few tablespoons of milk to the above ingredients, then add more as needed until you reach your desired consistency. Alternatively, you can place all salad dressing ingredients in a small blender, then pulse until smooth and creamy.
Store the dressing in an airtight container in the refrigerator. The dressing will keep for up to 1 week.