Wash the bell peppers and slice the tops off. Remove the seeds and membranes from inside.
In a large skillet, heat the olive oil over medium heat. Add the ground turkey or beef, and cook until browned, breaking it apart with a spoon. Drain excess fat.
Stir in the taco seasoning and cook for an additional 2 minutes, following package instructions.
Add the cooked rice, black beans, corn, and half of the salsa to the meat mixture, stirring until well combined. Cook for another 3-5 minutes until heated through.
Stuff each bell pepper with the taco mixture, pressing down gently to pack them. Place the stuffed peppers upright in a baking dish.
Pour the remaining salsa over the top of the stuffed peppers, and sprinkle with shredded cheese.
Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes.
Remove the foil and bake for an additional 10-15 minutes, until the peppers are tender and the cheese is bubbly and golden.
Let the peppers cool slightly before serving. Garnish with fresh cilantro, if desired. Serve with a dollop of sour cream on the side.
Notes
Garnish with fresh cilantro and serve with sour cream for added flavor.