Peel and wash the potatoes and cut into large cubes. Clean, wash and cut spring onions into rings. Sauté potatoes and onion white in hot oil, pour on broth. Cook potatoes for about 15 minutes. Puree with the cutting stick of the hand mixer and season with salt, pepper and nutmeg.
Let the soup cool down while stirring it several times. Rinse crabs and sprouts cold and drain well. Divide the soup between four plates. Put a dash of crème fraîche on each plate. Sprinkle with spring onions, crabs and sprouts
Plate: Wedgwood