Preheat oven to 450 degrees. Line a quarter sheet pan with a silicone baking mat.Spread the pepperoni on a paper towel lined plate and microwave on high for 20 seconds. Use the paper towel to dab off all of the excess grease you can.Slice (or break) the bagels in half so that you have 6 pieces, place on the prepared baking sheet. For each bagel bite, spread 1 tablespoon of sauce over top, sprinkle ½ tablespoon of parmesan cheese over the sauce, then sprinkle 2 tablespoons of mozzarella, followed by a generous amount of pepperoni.Place in the oven to bake until the cheese is melty and the pepperoni begins to get crispy around the edges, about 8-10 minutes. Remove from the oven and allow to cool for 3-4 minutes before sprinkling the tops with the remaining parmesan cheese and chopped herbs (if desired).