Mushroom Wine Sauce
["2 Tbsp. butter", "2 Tbsp. flour", "1 c. chicken stock", "1/2 c. dry white wine", "1/2 tsp. tarragon", "salt and pepper", "4 oz. can mushroom pieces or 1/4 lb. fresh, sliced and sauteed for 5 minutes in butter", "1/2 c. half and half", "1 egg yolk"]
["Melt butter in saucepan and add flour.", "Cook, without browning, stirring constantly, for several minutes.", "Slowly add stock, wine and spices. Simmer several minutes and add mushrooms. Simmer for 5 minutes. Remove from heat and stir in creamed mixed with egg yolk.", "Cook, stirring, until heated through. Do not let boil.", "May be made a day ahead and reheated."]
["butter", "flour", "chicken stock", "white wine", "tarragon", "salt", "mushroom", "egg yolk"]