1Heat coals or gas grill for direct heat. Cut four 18x12-inch pieces of heavy-duty foil; spray with cooking spray. Cut fish into 4 serving pieces if necessary. Place 1 fish piece on each foil piece. Sprinkle fish with 1 teaspoon of the basil, 1/2 teaspoon of the lemon pepper and 1/2 teaspoon of the seasoned salt.
2Arrange zucchini and bell pepper over fish. Sprinkle with remaining basil, lemon pepper and seasoned salt. Drizzle with oil. Fold foil over fish and vegetables so edges meet. Seal edges, making tight 1/2-inch fold; fold again. Allow space on sides for circulation and expansion.
3Cover and grill packets over medium heat 15 to 20 minutes or until fish flakes with fork and vegetables are tender. Place packets on plates. Cut large X across top of each packet; fold back foil.