Brown the ground beef with the onion and taco seasoning.
Cut the peppers vertically and scoop out the insides and seeds.
In a mixing bowl, combine the beans, corn, tomatoes, cilantro and seasoning. Fill up the pepper "shells" and top with a pinch full of cheese on each pepper.
Bake in the preheated oven for 15 to 20 minutes, or until cheese has melted and peppers have softened.
Serve Walking Stuffed Peppers with a side of rice and chips & salsa.