01 - Preheat oven to 350°F.
02 - Without separating the rolls, slice the entire block horizontally to create top and bottom halves.
03 - Place bottom half on parchment-lined baking sheet. Layer cheese slices evenly. Add bacon or tomato if using.
04 - Cover with top half of rolls. Brush tops liberally with melted butter.
05 - Cover loosely with foil and bake for 10 minutes until cheese is melted.
06 - Uncover and bake 3-5 minutes until tops are golden brown.
07 - Remove from oven, let cool 2 minutes, separate into individual sandwiches and serve warm.