Preheat oven to 400°. In a bowl, combine beans, tomatoes, zucchini, onion, garlic, wine, ½ teaspoon salt and ⅛ teaspoon pepper.
Rinse fish and pat dry. Place each fillet on an 18x12-inch piece of heavy-duty foil; season with remaining ¼ teaspoon salt and ⅛ teaspoon pepper. Spoon bean mixture over fish; top with lemon slices. Fold foil around fish and crimp edges to seal. Transfer packets to a baking sheet.
Bake until fish just begins to flake easily with a fork and vegetables are tender, 15-20 minutes. Be careful of escaping steam when opening packets.
