Roasted Tomato Balsamic Vinaigrette Review

I had never heard of double concentrated tomato paste before, but while I was shopping the other day, sure enough, there it was on the top shelf. (It's sold by the tube, and the tube is in a box, in case you're looking for it). It has a deep dark color and very rich, tomato flavor. I followed the recipe to a "T", but couldn't get the vinaigrette to emulsify. No matter what I did, I couldn't get it to blend together nicely. The oil kept separating and immediately going to the top. I considered putting it in my food processor, but I didn't want to dirty it for such a small amount of dressing. We ate it as is, and it had a nice flavor.