In a medium Dutch oven over medium heat, heat half of the oil until hot. Add the carrot, onion, bell pepper, oregano, thyme, garlic and 1 tablespoon butter and cook until the vegetables begin to soften, 7 to 8 minutes.
Add the rice, spaghettini and the rest of the oil and stir to coat, toasting both in the oil, about 2 minutes.
Add the stock and bay leaves and bring to a boil. Reduce the heat to a bare simmer, then cover and cook until the rice is tender but still a little chewy, about 45 minutes. Remove from the heat and let sit, covered, 10 minutes.
Uncover and fluff the rice with a fork. Add the scallions and remaining tablespoon butter and stir to combine and melt the butter. Remove the bay leaves and season with salt and pepper. Serve immediately. |