Grilled Cheese Sandwich

Heat a large cast-iron or heavy metal skillet over medium-low heat. Place two slices of bread on a work surface, and cover each with a layer of Monterey Jack and a layer of cheddar cheese; top with the remaining slices of bread. Generously butter both outer sides of the sandwiches, spreading butter all the way to the edges of the bread.

Place the sandwiches in the skillet, and press down only lightly with the back of a spatula. Cook until golden brown on each side, and the cheese has completely melted, 3 to 4 minutes per side. Cut in half lengthwise, and serve immediately.