01 - Spread 1 tablespoon softened butter evenly on one side of each bread slice.
02 - Place two bread slices butter-side down on a clean work surface. Spread 2 tablespoons pizza sauce over the unbuttered side of each slice.
03 - Arrange mozzarella slices evenly over the sauce. Top with pepperoni if desired, then sprinkle with Parmesan cheese, oregano, and basil.
04 - Place remaining bread slices on top, buttered side facing outward, to create two complete sandwiches.
05 - Heat a nonstick skillet over medium heat. Place sandwiches in the pan and cook for 3–4 minutes per side, pressing gently with a spatula, until bread is golden brown and cheese is thoroughly melted.
06 - Remove from skillet, let cool for 1–2 minutes, slice diagonally, and serve immediately.