01 - Preheat oven to 375°F. Lightly grease a baking dish large enough to hold all pepper halves.
02 - Place bell pepper halves in the prepared dish cut side up. Drizzle with olive oil and season with a pinch of salt and pepper.
03 - In a large bowl, combine ricotta, Parmesan, mozzarella, egg, basil, parsley, chives, garlic, lemon zest, 1/2 tsp salt, and 1/4 tsp black pepper. Mix until smooth and well blended.
04 - Spoon the ricotta mixture evenly into each pepper half, smoothing the tops with a spatula.
05 - Cover the baking dish with aluminum foil and bake for 25 minutes until peppers begin to soften.
06 - Remove the foil and continue baking for 10 minutes, or until the filling is set and the tops are lightly golden.
07 - Remove from oven and let cool slightly. Garnish with extra fresh herbs if desired. Serve warm.