Cut the tops off the bell peppers and remove the seeds and membranes. Set aside.
In a large bowl, combine the shredded chicken, BBQ sauce, corn, black beans, cooked quinoa, garlic powder, onion powder, salt, and pepper. Mix until well combined.
Stuff each bell pepper with the BBQ chicken mixture, packing it tightly.
Place the stuffed peppers upright in a baking dish. If they don't stand well, you can slice a tiny bit off the bottom to make a flat surface.
Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes.
Remove the foil, sprinkle shredded cheddar cheese on top of each pepper, and bake for an additional 10 minutes, or until the cheese is melted and bubbly.
Once done, remove from the oven and let cool for a few minutes. Garnish with fresh cilantro if desired.
Notes
Serve the stuffed peppers on a platter, drizzling some extra BBQ sauce around the base of the peppers for a flavorful touch.