Preheat your oven to 400°F (200°C).
Wash the sweet potatoes and pierce them several times with a fork. Place them on a baking sheet.
Bake the sweet potatoes for about 45 minutes, or until they are tender enough to be easily pierced with a fork.
While the sweet potatoes are baking, heat the olive oil in a pan over medium heat.
Add the diced red bell pepper and cook for 5 minutes until softened.
Stir in the black beans, corn, chili powder, cumin, salt, and pepper. Cook for another 5 minutes, then remove from heat.
Once the sweet potatoes are done, let them cool for a moment, then slice them open lengthwise and fluff the insides with a fork.
Stuff each sweet potato with the vegetable and bean mixture.
Serve immediately and enjoy your stuffed sweet potatoes.