How to Make It
In a medium soup pot, melt the butter in the olive oil. Add the sliced carrots, sliced onion and grated ginger, cover and cook over moderately high heat for about 8 minutes, stirring the vegetables occasionally, until just beginning to soften. Add the vegetable stock and nutmeg to the vegetables and season liberally with salt and pepper. Cover and cook the soup over moderate heat until the carrots and onions are very soft, about 10 minutes.
Puree the carrot soup in batches in a blender. Return the carrot soup to the soup pot. Stir in the crème fraîche and chopped cilantro and season the carrot soup with salt and pepper. Serve the soup in shallow bowls.