Preheat the oven to 375°F (190°C). Cut the tops off the bell peppers and remove the seeds.

In a skillet over medium heat, cook the ground beef until browned. Drain excess fat.

In a mixing bowl, combine cooked rice, black beans, corn, cheese, cumin, paprika, salt, and pepper. Stir in the cooked beef.

Stuff each bell pepper with the filling mixture and place them upright in a baking dish.

Cover the baking dish with foil and bake for 25 minutes. Remove the foil and bake for an additional 5 minutes until the tops are golden.

Serve hot with salsa and sour cream on the side.