Fold 4 – 14 x 18 inch sheets of parchment paper in half. Open up sheets and place an equal amount of onion, zucchini, and red pepper on one side of each sheet. Place salmon on top of vegetables. Drizzle lemon juice over top. Fold empty half of parchment sheets over salmon and vegetables and crimp them shut. Place fish packets on 2 baking sheets and cook for 20 minutes. Let rest for 5 minutes before carefully opening packets.
Meanwhile, in skillet over medium heat, warm oil. Add garlic and ginger to pan and cook for 1 minute. Add blackberries, 1 tsp balsamic vinegar, thyme, honey, lemon zest, cinnamon, salt, black pepper, and chili powder (if using) to pan. Bring to a boil, reduce heat to medium-low, and simmer, uncovered, for 15 minutes. Stir in remaining balsamic vinegar.
Serve salmon and vegetables topped with blackberry sauce and parsley.
Recipe Notes
Per serving: 330 calories; 26 g protein; 18 g total fat (4 g sat. fat); 18 g total carbohydrates (10 g sugars, 6 g fiber); 224 mg sodium