Cut ½-inch thick vertical slices into the King's Hawaiian round loaf. Evenly layer peanut butter on one slice and the chocolate hazelnut spread on the other.
Distribute an even layer of marshmallows and place the halves together.
Place sandwich into the press and, depending on the heat, remove after two to four minutes. Cut into halves or thirds. -- Serve immediately.
Recipe by Webicurean at http://blog.webicurean.com/2008/03/05/kings-hawaiian-chocolate-paradise-panini/