Follow these simple steps to make your One Pan Orzo Stuffed Peppers:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prep the Peppers: Cut the tops off the bell peppers and remove the seeds. Lightly brush the outside of the peppers with olive oil and place them in a baking dish.
3. Cook the Orzo: In a medium saucepan, bring the vegetable broth to a boil. Add the orzo and cook according to package instructions until al dente, usually about 8-10 minutes.
4. Sauté Vegetables: In a skillet, heat a tablespoon of olive oil over medium heat. Add diced onion and garlic, sautéing until translucent, about 2-3 minutes.
5. Mix Filling: In a large bowl, combine the cooked orzo, sautéed onion and garlic, diced tomatoes, chopped spinach, oregano, basil, salt, and pepper. Stir until well mixed.
6. Stuff the Peppers: Spoon the orzo mixture into each bell pepper, packing it tightly. If desired, top with shredded mozzarella cheese.
7. Bake: Pour any remaining broth into the bottom of the baking dish to keep the peppers moist. Cover with foil and bake for 25 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the peppers are tender.
8. Serve: Remove from the oven and let cool for a few minutes before serving.

This easy-to-follow method ensures that your One Pan Orzo Stuffed Peppers turn out perfect every time.