Preheat broiler to high.

Using a small knife, carefully cut a slit down one side of each pepper. Scoop out the seed pods with a small spoon.

Cut the mozzarella into thick rectangles. Stuff each pepper with a slice of cheese and a fresh basil leaf. Repeat with all peppers.

Place peppers on a baking sheet, drizzle with olive oil and sprinkle with salt and pepper. Broil until skins are charred and cheese is melted.

Garnish with additional basil leaves and serve.