I am a huge fruit soup fan. Blueberry just might be my favorite. It particularly pleases my very particular pallet.
2 c blueberries
1 c water
1 tsp cinnamon
2 tsp cardamom
1/3 c sugar
3/4 c sour cream
Bring blueberries, water, cinnamon, cardamom, sugar to a boil. Simmer for a few minutes until blueberries are plumped or exploded. Using an immersion blender, blend until desired consistency. Add sour cream and mix. Refrigerate until cold. Serve with creme fraiche.
post script: if you don't have cardamom, please wait until you do to make this.