01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - Without separating, slice entire block of rolls horizontally to create top and bottom halves.
03 - Arrange the bottom half of the rolls on the prepared baking sheet. Evenly layer cheddar cheese and add deli ham or turkey if using.
04 - Position the top half of the rolls over the cheese and optional fillings.
05 - Combine melted butter with mustard, honey, and garlic powder as desired. Brush this mixture over the tops of the rolls.
06 - Bake for 10 to 15 minutes, until cheese melts and tops are golden brown.
07 - Allow to cool for 2 minutes. Cut into individual mini sandwiches and serve while warm.