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. Pulse until smooth and creamy.
Store the dressing in an airtight container in the refrigerator. The dressing will keep for up to 1 week.