Preheat the oven to 375°F (190°C).
Cut the tops off the bell peppers and remove the seeds.
In a skillet, brown the ground meat over medium heat.
Add diced tomatoes, black beans, corn, rice, cumin, and chili powder to the skillet.
Season with salt and pepper, mixing well.
Stuff each pepper with the meat and rice mixture.
Place stuffed peppers upright in a baking dish.
Top each pepper with shredded cheese.
Cover the dish with foil and bake for 20 minutes.
Remove foil and bake for an additional 10 minutes until cheese is bubbly.