Never heard of it, but it sounds good, and I would guess that you could puree some cucumber, add some white vinegar, olive oil and a little onion and cayenne pepper. And why not a bit of yogurt while you're at it? Yum

Try pureeing a skinned and seeded cucumber with oil, vinegar, onions, herbs, mustard with a pinch of sugar and salt in a blender until smooth.

Thanks. This is exactly what I was thinking. What I'm still curious about is how many cucumbers you would use and how long you think this should last in the fridge.

Was a kind of a tzaziki (spelling) sauce?

http://www.food52.com/recipes...
I added this recipe about a year ago and the cucumbers alone are worth making. Adding minced shallots would be great; maybe it will give you some inspiration.

Here is a Cucumber dressing I posted on F52 you could check out:
http://www.food52.com/recipes...

And, here is my version tzatziki that inspired the recipe:
http://www.food52.com/recipes...

And here is my version of cucumber dressing: http://food52.com/recipes...

You can use rice vinegar, champagne vinegar, but I don't recommend apple cider vinegar.