Butter one side of each bread slice. Top the unbuttered side of two of the slices with a slice of each cheese. Set on the other bread slices, buttered side up. Heat a skillet over medium heat. Add the sandwiches and grill 4 minutes per side, or until the cheese is melted and the bread is golden brown. Rest sandwiches a minute, then cut and serve.
Note: The cheese slices are sold in our Deli. Ensure they cover the entire surface of the bread.