Brush tenderloin with olive oil & seasoning. Place tenderloin in a 9 x 13 pan lined with foil. Roast for about 35 – 40 minutes or until just a FAINT pink color in center remains.
Bring water to a boil in a small saucepan. Add couscous & simmer on low for 8 minutes. (Your couscous should be firm, not mushy). Remove pan from heat & add remaining ingredients, mixing well.
Place couscous in a serving dish, cover to keep warm. Allow tenderloin to rest 10 minutes then slice & place on serving dish.