1Heat oven to 400°F. Cut 2 (16-inch) squares cooking parchment paper or foil.
2Season both sides of fish with cinnamon, salt and pepper; place 1 piece each onto middle of parchment paper. For each piece, top with half the zucchini, olives and tomatoes; season with a pinch more salt and pepper. Pour 1 tablespoon stock over each, then top with half the orange slices and thyme.
3To make packets, roll and crimp opposite sides of parchment paper together over fish and vegetables, then roll and crimp ends to prevent steam from escaping. Place packets on cookie sheet.
4Bake 12 to 15 minutes or until fish flakes easily with a fork. Transfer packets to plates for serving.