For a fun party starter, serve this soup in little glasses. (Unless you have white carpet.)
Blend: In a blender, puree the first 7 ingredients.
Heat: In a medium saucepan, simmer the soup over medium-low until heated through, about 10 minutes; season.
Serve: In a small bowl, mix the crème fraîche and horseradish. Drizzle over the soup. Top with cabbage and dill.