Begin by preheating your oven to 375°F (190°C) for optimal baking.
While the oven is heating, prepare the bell peppers by slicing the tops off gently. Carefully remove the seeds and membranes from inside each pepper. Arrange the cleaned peppers upright in a baking dish, ensuring they can stand without tipping over.
In a large mixing bowl, combine the shredded chicken, fresh basil pesto, and your choice of either cooked quinoa or rice. Add the halved cherry tomatoes, half of the shredded mozzarella cheese, and half of the grated Parmesan cheese. Stir everything together until well mixed. Add salt and pepper to taste, ensuring the mixture is flavorful.
Generously stuff each bell pepper with the chicken mixture, pressing down slightly to ensure it's packed in nicely.
Finish by sprinkling the remaining mozzarella and Parmesan cheese over the tops of each stuffed pepper for a cheesy finish.
To bake, cover the baking dish with aluminum foil to help the peppers cook evenly. Bake in the preheated oven for 25 minutes. After this time, remove the foil and continue baking for an additional 10-15 minutes, or until the cheese is melted, bubbly, and golden brown.
Once finished baking, carefully remove the stuffed peppers from the oven and let them cool for a few minutes to avoid burns when serving.
Just before serving, garnish each pepper with fresh basil leaves for a burst of color and flavor.
Notes
Serve on a vibrant platter and drizzle with extra pesto for an elegant touch.