01 - Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 - Using a serrated bread knife, slice the entire block of Hawaiian rolls horizontally to separate into top and bottom halves, keeping the rolls attached.
03 - Arrange the bottom half of the rolls on the parchment-lined baking sheet. Evenly layer sliced cheddar cheese across the surface. If desired, add deli ham or turkey on top of the cheese.
04 - Place the top half of the rolls over the cheese and optional meat.
05 - Mix melted butter with mustard, honey, and garlic powder if desired. Brush this mixture evenly over the tops of the rolls using a pastry brush.
06 - Bake in the preheated oven for 10 to 15 minutes until the cheese is melted and the tops of the rolls are golden brown.
07 - Allow to cool for 2 minutes, then slice into individual mini sandwiches. Serve warm.