Saute the onions in butter until soft. Add in the remaining ingredients and bring to a simmer.
Allow to simmer for approximately 15 minutes.
Puree with a stick blender until smooth, then check for seasonings. Cool to room temperature and refrigerate.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.
Recipe courtesy of Chef Jon Bonnell