Step 1

Put the herbs, lemon juice, olive oil, garlic, and anchovies into a blender or food processor. Process until smooth. Scrape down the sides of the machine a couple of times, as necessary.

Step 2

Add the mayo and process briefly to combine. Taste and season with salt and pepper. Adjust any of the other ingredients at this time and process to blend in.

Step 3

Put the dressing in an airtight container and refrigerate until needed. Will keep a minimum of one week, refrigerated.