Meanwhile, heat 1 tablespoon of the olive oil in each of 2 large, deep skillets. Add 2 cups of the couscous to each skillet and cook over moderate heat, stirring constantly, until the couscous is deep golden, about 5 minutes. Add 2 cups of the water to each skillet and bring to a boil. Cook until the couscous is barely tender, about 5 minutes. Remove the skillets from the heat and cover. Let stand until all of the water has been absorbed, about 30 minutes.