Boil the water in a pot when finish boiling, set aside.
In a large bowl, combine 1 cup couscous with hot water, stirring once to evenly distributed couscous cover & let it sit for 10 minutes or more. I sometime use Far East Plain Couscous mix following cooking directions on the box.
Fluff couscous with a fork and add walnuts, Feta cheese, red/green grapes, chopped parsley, olive oil, lemon juice, salt & pepper mix altogether, serve hot. You can chill and served over a nice salad.
If you or family members don't like grapes, use grape/ cherry tomatoes. Adjust salt & pepper to your liking.