Add olive oil to heavy hot saucepan. Add onions, garlic, mushrooms, saute until mushrooms are tender. Add flour and cook about 1 minute then deglaze pan with Marsala wine. Add beef stock and cook until thick and flavors are blended.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Drury Lane Theater and Conference Center, Chicago, IL