Vegetarian Stuffed Peppers

To roast the peppers: Preheat the oven to 425 degrees Fahrenheit. Place the halved peppers in a large 9 by 13-inch baking dish, or on a rimmed baking sheet lined with parchment paper. Drizzle 1 tablespoon olive oil over the peppers and sprinkle them with salt and pepper. Use your hands to rub the oi