Spread the Nutella butter onto 1 slice of bread and make a sandwich by placing the other slice of bread on top.
Grill:
Butter both sides of the sandwich and place it into the hot pan. Grill for 2 minutes on the first side before flipping it over and grilling it for an additional 2 minutes or until the sandwich is golden brown on both sides. Remove the sandwich from heat and serve.
Pack it for school:
Allow the grilled sandwich to cool down to room temperature before packing it into a lunch container.