Fortified Raspberry Jam BY HELEN S. FLETCHER, ON October 24, 2012 COPYRIGHT, HELEN S. FLETCHER, 2013. ALL RIGHTS RESERVED. ALL PHOTOS BY T. MIKE FLETCHER, UNLESS OTHERWISE NOTED. Sprinkle the gelatin over the cold water. Place the jam in a small saucepan and bring it to a simmer. Microwave the gelatin to liquefy it and stir it into the jam. Cover with film and refrigerate for several hours or until set up.