1Preheat your oven to 375°F (190°C).
Cut the tops off the bell peppers and remove the seeds and membranes.
In a large bowl, combine the cooked quinoa, black beans, corn kernels, diced tomatoes, red onion, cilantro, lime juice, cumin, chili powder, salt, and pepper.
Stuff each bell pepper with the quinoa mixture.
Place the stuffed peppers in a baking dish and cover with aluminum foil.
Bake in the preheated oven for 30-35 minutes, or until the peppers are tender.
Remove the foil and bake for an additional 5-10 minutes to allow the tops to brown slightly.
Remove from the oven and let cool for a few minutes before serving.