01 - Lay out all bread slices and spread a thin layer of softened butter on one side of each slice.
02 - Flip two slices buttered side down and spread 2 tablespoons of marinara sauce evenly on each unbuttered side.
03 - Sprinkle half the mozzarella over the sauced bread, layer pepperoni slices on top, then add remaining mozzarella and half the Parmesan.
04 - Place remaining bread slices on top with buttered sides facing outward to create two complete sandwiches.
05 - Cook in a non-stick skillet over medium heat for 3-4 minutes per side, pressing gently until bread turns golden brown and cheese melts completely.
06 - Sprinkle with dried oregano, garlic powder, and remaining Parmesan during final minute of cooking. Slice each sandwich diagonally and serve with warm marinara for dipping.