Prepare the bell peppers by carefully slicing off the tops and removing the seeds and membranes from the insides.
In a large mixing bowl, combine the shredded chicken with the basil pesto, cooked quinoa or rice, halved cherry tomatoes, half of the grated mozzarella, and the parmesan cheese. Season with salt and pepper to taste.
Generously stuff each bell pepper with the chicken and pesto mixture, pressing down gently to pack it in well.
Arrange the stuffed peppers upright in a baking dish. Drizzle olive oil over the tops.
Cover the baking dish with aluminum foil and bake for approximately 25 minutes.
After 25 minutes, remove the foil and sprinkle the remaining mozzarella cheese on top of each stuffed pepper. Bake uncovered for an additional 10-15 minutes, or until the peppers are tender and the cheese is melted and bubbly.
Let the stuffed peppers cool for a few minutes before serving.
Notes
For an eye-catching presentation, serve on a colorful platter and garnish with fresh basil leaves.