I made this for lunch today, I was short the celery and onion and had to swap a few items around, but all in all the dressing should come out similar for others. This was lovely for lunch. I was a little bit worried when I sniffed it after adding the vinegar but dug in and it was great, nice and tangy.
I didn't use quite so much mayo, used low fat plain yogurt, used diced capsicum and tarragon leaves instead of oregano. I will definately make this again and try to have the proper ingrediants on hand when I do. Thanks for a great recipe.