Heat oven to 450º. Place zucchini and onion on 1 sheet pan and season with salt and pepper. Cook for 10 minutes. On a second sheet pan, place chicken breasts and season. Cook for 20 minutes in oven. In a small saucepan, combine tomatoes, juice, vinegar, wine, spices, and bring to slow boil. Top each breast with roasted onion, zucchini, and tomato sauce.