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 on the unbuttered side of each slice.
03 - Arrange mozzarella slices over the sauce, followed by pepperoni if using. Sprinkle evenly with Parmesan, oregano, and basil.
04 - Top with remaining bread slices, buttered side facing outward.
05 - Heat a nonstick skillet over medium heat. Place sandwiches in the pan and cook for 3–4 minutes, pressing gently with a spatula, until golden brown.
06 - Flip sandwiches carefully and cook another 3–4 minutes until bread is crispy and cheese is fully melted.
07 - Remove from skillet, let cool for 1–2 minutes, slice diagonally, and serve immediately with extra pizza sauce for dipping.