Creating Easy Vegetarian Stuffed Bell Peppers with Rice is a breeze 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 and membranes. Arrange them upright in a baking dish.
3. Cook the Filling: In a skillet over medium heat, sauté the chopped onion and minced garlic until softened (about 3-4 minutes).
4. Mix Ingredients: In a large bowl, combine cooked rice, black beans, corn, diced tomatoes, sautéed onion, garlic, cumin, chili powder, smoked paprika, and salt. Mix until well combined.
5. Stuff the Peppers: Spoon the filling into each bell pepper until they are generously filled.
6. Add Cheese: If using, sprinkle shredded cheese on top of each stuffed pepper.
7. Cover with Foil: Cover the baking dish with aluminum foil to prevent drying out.
8. Bake: Place the dish in the preheated oven and bake for 30-35 minutes. Remove foil during the last 10 minutes to allow the cheese to melt and brown slightly.
9. Cool and Garnish: Once done, let the stuffed peppers cool for a few minutes before garnishing with fresh cilantro.
10. Serve: Serve warm and enjoy your delicious vegetarian meal!

These straightforward steps will guide you in making this incredible dish effortlessly.