First boil the milk along with the bay leaves, peppercorns and cloves. Strain and keep the milk.
Melt the butter in a pan, add onions and mushrooms and cook till they are soft. Add the flour and sauté till there is no raw flavor coming from the flour, taking care that the flour does not get burnt.
Pour the milk slowly, and stir continuously to avoid lumps from forming. Cook for five minutes. Puree the mixture when cool. Boil it, correct the consistency by adding more milk if required. Add the cream, salt, pepper and nutmeg powders. Stir well, and serve hot with a dash of cream.
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