01 - Preheat oven to 400°F and line baking sheet with parchment paper or silicone mat
02 - Place pepperoni slices in single layer on prepared sheet, spacing slightly apart
03 - Distribute cheddar and mozzarella cheese mixture evenly over each pepperoni slice
04 - Sprinkle Italian herbs and red pepper flakes over top if desired
05 - Bake 8-10 minutes until cheese bubbles and turns golden, pepperoni edges crisp
06 - Let rest 2-3 minutes on tray, transfer to paper towel-lined plate to absorb excess oil
07 - Serve warm or at room temperature