Combine sugar, lemon rind, salt and pepper in small bowl to make dry rub. Rub mixture over salmon. Cover and refrigerate at least 30 minutes.
Heat oven to 425 degrees F. Coat shallow baking dish with nonstick cooking spray. Cut salmon into 4 equal pieces. Place salmon, skin side down, in baking dish.
Roast in 425 degree F oven for 10 to 12 minutes or until fish is easily flaked with a fork. Makes 4 servings.