Cut the peppers in half, remove the ribs and seeds and place in a 9 x 13 inch baking dish. Use 1 tbsp of the oil to rub all over the peppers.
Heat the remaining oil in a large sauté pan over medium heat and sauté the onions for 3 minutes.
Add the cooked rice, beans, corn, tomatoes, lime juice, cumin, paprika and salt and stir together to combine. Cook the mixture for 5 minutes or until liquid evaporates. Add 1/2 cup grated cheese.
Divide the mixture between the pepper halves and top with remaining cheese.
Cover the dish with foil and bake for 30 minutes. Uncover for an additional 10 minutes or until peppers are fork tender and cheese is melted.