Slice the tops off the bell peppers and remove the seeds and membranes. Set aside.
In a large mixing bowl, combine the shredded chicken, basil pesto, cooked quinoa or rice, cherry tomatoes, half of the mozzarella, and parmesan cheese. Season with salt and pepper to taste.
Stuff each bell pepper with the chicken and pesto mixture, pressing down gently to pack it in.
Place the stuffed peppers upright in a baking dish. Drizzle a bit of olive oil over the tops to enhance flavor and prevent drying.
Cover the baking dish with foil and bake in the preheated oven for about 25 minutes.
Remove the foil and sprinkle the remaining mozzarella cheese on top of each pepper. Bake uncovered for an additional 10-15 minutes, until the peppers are tender and the cheese is bubbly and slightly golden.
Let the stuffed peppers cool for a few minutes before serving.
Notes
Serve on a vibrant platter, garnished with fresh basil leaves and extra pesto for flair.