I have been making this a lot since I found the recipe. I love food52 site.
https://food52.com/recipes/60426-april-bloomfield-s-grilled-vegetable-vinaigrette
I went to a cooking demonstration a while back where they made a really interesting roasted pear vinaigrette. I found this, which looks similar and very nice:
http://www.canadianliving.com/food/recipe/roasted-pear-and-greens-with-pear-vinaigrette