That looks so wonderful! There does not seem to be many cooks using Buttermilk for anything other than bread here in the United States these days, but I grew up drinking fresh buttermilk and mother used it in a lot of dishes. We never ever had cold soup though, and I would really like to try this :) The only thing is that I would probably be eating it all by myself, unless of course I neglected to tell them about the buttermilk lol.