Creating Vegetarian Stuffed Bell Peppers with Rice is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Bell Peppers: Cut the tops off the bell peppers and remove the seeds. Set them aside.
3. Cook the Filling: In a large skillet, heat the olive oil over medium heat. Add the chopped onion and garlic, sautéing until translucent, about 4-5 minutes.
4. Add Vegetables: Stir in the corn, diced tomatoes, black beans, cooked rice, chili powder, cumin, paprika, salt, and pepper. Cook for another 5-7 minutes until all ingredients are heated through.
5. Stuff the Peppers: Spoon the rice mixture into each prepared bell pepper, filling them generously to the top.
6. Arrange in a Baking Dish: Place the stuffed peppers upright in a baking dish. If desired, sprinkle cheese on top of each pepper.
7. Cover and Bake: Cover the dish with aluminum foil and bake in the preheated oven for 25 minutes.
8. Uncover and Finish Baking: Remove the foil and bake for an additional 10 minutes, or until the peppers are tender and cheese is bubbly.
9. Garnish and Serve: Once done, remove from the oven. Garnish with fresh cilantro or parsley if desired.

These steps will guide you in creating Vegetarian Stuffed Bell Peppers with Rice effortlessly.