Heat nonstick panini maker to medium heat.
Remove loaf of dough from can. Cut loaf into 4 equal pieces. Shape each piece into 6x5-inch oval or rectangle.
For each panini, place 1 piece of candy, a few banana slices and 2 marshmallow halves on half of each dough rectangle. Fold other half of each rectangle over filling; crimp edges to seal.
Place 1 or 2 panini at a time in panini maker (this will depend on size of panini maker—do not allow panini to touch).
Cook 2 to 3 minutes or until tops are golden brown and dough is completely baked. Serve warm.