method
1. Fill a large pot to the depth of 3.5 cm (1 1/2 in) with cold water.
2. Add the green beans, mushrooms and asparagus.
3. Cook over a low heat for 5 minutes.
4. Add the clarified butter or oil, nutmeg, pepper and salt. Cook for a further 1 minute.
5. Put the vegetables, along with the egg yolk and 100 ml (4 fl oz) of the cooking liquid, in a blender or food processor.
6. Puree in bursts of 30 seconds until the vegetable mixture is smooth and well blended.
7. Serve hot with croutons.
serving amount
serves 6
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