Mushroom Gravy for Hamburgers

1 1/4 c water1/3 t soy sauce
1 T beef concentrate
1 T Worcestershire sauce
1/4 t minced onion
1 pinch salt
1 pinch nutmeg
1 T plus 1 t sherry wine
4 T flour blended in 3/4 c cold water
8 oz mushrooms sliced thin

Place all ingredients except flour past and mushrooms in a sauce pan. Stir and bring to a boil and down to a simmer.  Mix the flour and water and then strain into the gravy - stirring with a french whip until thickened. Add mushrooms, heat and pour over hamburger patties.