Set your oven to 400°F and rub the pepper halves with olive oil, salt and pepper. Roast them until they begin to char and soften. This brings out their natural sweetness and makes them ready for stuffing.
Heat olive oil in a saucepan, then sauté minced garlic, red pepper flakes and lemon zest briefly. Add the couscous and toast it until golden, then stir in lemon juice, herbs and water until fluffy.
Slice cherry tomatoes and toss with fresh basil, olive oil, salt and pepper. Set aside so they’re ready to add inside the peppers later.
Fill each roasted pepper with warm couscous, then add half the marinated tomatoes. Layer fresh mozzarella slices on top and return to the oven until the cheese melts and tomatoes soften.
Once out of the oven, drape prosciutto slices over each pepper and scatter extra basil and black pepper. This adds texture and extra savory flavor.