Heat couscous and oil in medium saucepan over medium heat, stirring frequently, until about half of the grains are golden brown, about 5 minutes. Stir in water and salt, increase heat to high, and bring to boil. Reduce heat to medium-low, cover, and simmer, stirring occasionally, until water is absorbed and couscous is tender, 9 to 12 minutes. Off heat, let couscous sit, covered, for 3 minutes. Serve.