Sprinkle garlic salt on both sides of brisket. Place in shallow roasting pan, add remaining ingredients,(except mushrooms) pour wine over all. Cook 3 hrs, uncovered at 325. (till tender), turning every hour, adding more wine if necessary) Clean and slice mushrooms thinly and add during last 1/2 hour.
Gravy made from drippings.
Serves a crowd. Slice it thinly.