Place meat in a large shallow glass baking dish. Combine soy sauce, wine, and sugar and pour over meat. Place ginger, garlic and onion on top of meat. Let stand 24 hours, covered, in the refrigerator. Turn once. Bring meat to room temperature and broil over hot coals 4-5 minutes per side. Slice across width of meat, against the grain, into thin strips for serving. You may substitute the powdered spices with fresh in the same amounts. Just mix them into the sauce before pouring over meat.