Leave to thaw at room temperature the tramezzino bread , holding it in his pack so that it does not dry on contact with air, then lay the slices of bread in a work plan.
Brush entire surface of the slice with the mayonnaise. Prepare a mixture for the filling to your taste. In this example we will use slices of ham that are placed in both ends of the slice of bread. Place some mushrooms campignon on the top.
Roll up both ends on themselves to form two rolls touching.
Separate them with a knife and cut them. Cover and keep the sandwiches in the fridge