Place salmon in large skillet. Sprinkle with pepper. Add 1 cup water to salmon. Cook for 45 seconds, then turn salmon over and cook for 45 seconds. Remove the pan from the heat and let set covered for 2-3 minutes. Place salmon on plates.
Add tomatoes, zucchini, and chives to liquid in skillet. Cook over high heat, stirring constantly, until softened, 30-60 seconds. Add olive oil and boil for 1 minute. Spoon over salmon; serve.