I have no idea where she found this - probably in a cookbook somewhere. Anyway, I grew up on this stuff.
Take one pound of your favorite meat, and marinate it in this sauce for four hours. Or overnight if you like. I like to do chicken breast halves; or sirloin steak cut into thin strips and then skewered (after you are done marinating it of course). In a pinch, you can substitute powedered garlic for fresh.