Spread one slice of the bread (one side only) with half the butter. Place the bread buttered-side-down in a small skillet. Turn the skillet to medium heat.

Lay the sliced cheeses over the bread in the pan. Butter one side of the other piece of bread and place it buttered-side-UP on the cheese.

Let the sandwich heat through and grill gently on the first side for 6 minutes or so until the bread starts to brown lightly and the cheese melts. Gently flip the sandwich to brown the other side.

When the cheese is melted and bread is as dark as you'd like it, remove from the pan, cut into wedges, and serve!