Arrange frozen rolls on a large sheet cake pan or platter. Allow space between the rolls.
Cover with paper towels or kitchen towel, and thaw at room temperature for 1 hour.
When rolls are softened, flatten a roll in palm of hand. Arrange 6-8 slices of pepperoni in the roll.
Add small amount cheese if desired.(optional)
Fold sides up to cover pepperoni and roll into a ball or oval shape. Place on a parchment lined baking sheet.
Continue doing same with all of the rolls. When arranging on baking sheets, keep about 3 inches between each pepperoni roll. Cover with kitchen towels and allow to rise at room temperature for about 4 hours.
Bake @ 350 degrees until rolls are light golden brown.
Remove from baking sheet onto a paper towel lined plate to drain grease from the bottom. Allow to set for about 2 minutes, then transfer to a cooling rack.
Store in an air tight container or wrap individually in cling wrap.
Makes 36 rolls.