evidence: Finish the soup by removing the parmesan rind and thyme sprig sticks and blend with an immersion blender or blender until creamy and smooth. Taste & season with sea salt, freshly cracked pepper, or white wine vinegar, if needed. Ladle into bowls and top with freshly snipped chives and sour cream, if desired. Enjoy. [...] - Finish the soup by removing the parmesan rind and thyme sprig sticks and blend with an immersion blender or blender until creamy and smooth. Taste & season with sea salt, freshly cracked pepper, or white wine vinegar, if needed.