1. Preheat grill to medium-high heat (350° to 400°). Place each fish fillet, skin side down, on a 12- x 17-inch piece of aluminum foil. Sprinkle evenly with seasoning blend, and top with pineapple, bell pepper, and lime slices. Fold foil over fish, pinching tightly to seal.
2. Grill foil packets 7 to 10 minutes. (Open with care, as steam will escape.) Serve immediately.