Preheat your oven to 375°F (190°C). Carefully cut the tops off the bell peppers and remove seeds and membranes. Set aside.
In a medium saucepan, combine the rinsed quinoa and vegetable broth. Bring to a boil, then reduce to a simmer, cover, and cook for about 15 minutes or until liquid is absorbed and quinoa is fluffy.
In a large mixing bowl, combine the cooked quinoa, black beans, corn, diced tomatoes, chopped red onion, minced garlic, cumin, chili powder, and season with salt and pepper. Mix well until all ingredients are evenly distributed.
Stuff each bell pepper with the quinoa filling, packing it down lightly. Place the stuffed peppers upright in a baking dish.
Sprinkle shredded cheese generously over the top of each stuffed pepper.
Cover the dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10-15 minutes or until the cheese is melted and bubbly.
Once done, let the peppers cool for a few minutes before garnishing with fresh cilantro. Serve with lime wedges on the side for an extra zing.
Notes
Feel free to customize the filling with your favorite vegetables.