Freeze meat 1 hour to firm (makes slicing easier); slice into very thin strips. In skillet, brown mushrooms and cook carrots, celery and onions in oil until just tender; push to one side. Add meat; cook until color changes. Add gravy, spinach and soy. Heat; stir occasionally. Stir in radishes. Serve with rice.
Makes about 6 cups, 6 servings.