Preheat oven to 350°F

Butter each slice of bread on one side

Place one slice of bread butter side down on a foil-covered baking sheet.

Place cheese on top of bread slice

Place tomato slices on top of cheese (you can skip this step, or use ham, turkey, or whatever you like instead).

Place the other slice of bread on top, butter side up.

Bake in the oven for five minutes.

Flip the sandwich, and bake for another five minutes, or until both sides are golden brown.

Enjoy!