01 - Preheat the oven to 375°F (190°C).
02 - Cook the rice according to package instructions.
03 - While the rice is cooking, prepare the bell peppers by cutting the tops off and removing the seeds.
04 - In a large bowl, combine the cooked rice, diced tomatoes, oregano, basil, garlic powder, salt, and pepper. Mix well.
05 - Stuff each bell pepper with the rice mixture, packing it gently.
06 - Place the stuffed peppers upright in a baking dish and pour vegetable broth into the bottom of the dish.
07 - Cover the dish with aluminum foil and bake for 25 minutes.
08 - Remove the foil, sprinkle cheese on top if using, and bake for an additional 5 minutes or until the cheese is melted and bubbly.
09 - Serve warm, garnished with fresh herbs if desired.