Chopped pistachios and sliced scallions flavor this versatile side dish.
In a medium saucepan with a lid, heat oil over medium. Add white part of scallion; season with salt and pepper, and cook until soft, 1 minute.
Add 1 cup water; bring to a boil. Add couscous, remove from heat, cover, and let stand for at least 5 minutes. Add pistachios and remaining scallion. Season with salt and pepper; fluff with a fork, and serve.