Heat The Butter And Olive Oil In A Large Skillet Over Medium Heat. Place Salmon In The Skillet, And Season With Garlic, Lemon Pepper And Salt. Pour 1/4 Cup Water Around Salmon. Place Tomatoes And Cilantro In The Skillet. Cover, And Cook 15 Minutes, Or Until Fish Is Easily Flaked With A Fork. Bring 2 Cups Water To Boil In A Pot. Remove Form Heat, And Mix In Couscous. Cover, And Let Sit 5 Minutes. Serve The Cooked Salmon Over Couscous, And Drizzle With Sauce From Skillet.