Heat the oil over a medium high heat in a large saucepan.
Cook the couscous, stirring frequently, until golden (approximately 4–5 minutes).
Add 2 cups of water and salt and bring to boil. Reduce heat to medium low. Cover and simmer until the couscous is just tender and the liquid is absorbed (approximately 9–10 minutes). Set aside and cool slightly.
Mix the optional extras together in a bowl.
Make the dressing. Whisk oil, vinegar, all-purpose seasoning and pepper in small bowl until smooth.
Add couscous and dressing. Toss until all ingredients are coated and serve.