Toss zucchini, cherry tomatoes and green beans with 2 tbsp oil, lemon zest and ¼ tsp each salt and pepper. Place half the mixture in center of a large sheet of heavy-duty foil. Bring edges of foil together to create a tightly sealed packet. Repeat with remaining vegetables. Brush salmon with remaining oil and season with remaining salt and pepper.
Place vegetable packets on preheated medium-high grill, cook, covered, for 10 to 15 min. or until vegetables are tender-crisp. Grill salmon for 4 to 5 min. per side or until just cooked through.
Meanwhile cook pasta according to package directions and drain. In a bowl, make vinaigrette by whisking together olive oil, red wine vinegar, 2 tbsp chives, garlic, salt and pepper. Toss pasta with vegetables and vinaigrette. Flake salmon into pasta mixture. Toss gently to combine. Garnish with remaining chives.