Sorry Paul... further south...
Very easy....
1/2 cube butter melt in a pan
8oz of sliced mushrooms sautéed in the butter with black pepper and granulated onion to taste.
as the mushrooms start to soften almost cooked add 2 TBS of fresh chopped garlic..
sauté until the garlic blooms..
add 1/2 cup of brandy, burgundy or sherry (whatever the mood)
reduce to almost a syrup.
add beef stock (about 4 cups)
bring to boil and thicken with a rue/whitewash (flour and water or milk mix). Has to be minimum of 180* to thicken a sauce BTW. Not necessary to boil, but with a broth type sauce.. I will.. Creme sauce ... just before boil... Patience..
1tsp kitchen bouquet
1/2 tsp Worcestershire sauce
drop of soy
drop of A-1
Probably won't need salt... but salt to taste.
This is like a base sauce.. you can also add onions and peppers.. green peppercorns...
rosemary.. even a splash of balsamic vinegar.
In a restaurant.. I would do this as a natural reduction with a slice of butter at the end omitting a thickening agent. Cooked to order.