Gourmet Mushroom Soup - cooking recipe

Ingredients

1/2 c. flour
1/2 c. butter
3 to 3 1/2 c. chicken stock
1 1/2 lb. fresh sliced mushrooms
2 finely chopped shallots or scallions
1 c. heavy cream
3 egg yolks
Port wine or sherry (optional)

Preparation

Melt butter and make paste with flour.
Heat chicken stock and gradually add to flour paste.
Add mushrooms to soup base with shallots or scallions.
Cook 7 minutes, stirring often.
Mix together heavy cream and egg yolks and gradually ladle soup into cream mixture until they fill a quart measure.
Gradually bring to a slow boil and boil a few minutes.
Pour a little Port wine or sherry into each serving, if desired.