01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - Without separating the rolls, use a serrated bread knife to slice the block horizontally, making a top and bottom layer.
03 - Arrange the bottom half of the rolls on the prepared baking sheet. Layer cheddar cheese evenly. Add ham or turkey if desired.
04 - Place the top half of the rolls over the cheese and fillings.
05 - In a bowl, mix melted butter with mustard, honey, and garlic powder if using. Brush this mixture over the tops of the rolls with a pastry brush.
06 - Bake in the preheated oven for 10 to 15 minutes until the cheese has melted and the tops are golden brown.
07 - Let cool for 2 minutes, then cut into individual mini sandwiches. Serve warm.