1. Preheat grill.
2. Place fish in a large shallow dish; pour lemon juice over fish. Let stand 5 minutes.
3. While fish marinates, combine pepper blend and next 3 ingredients. Remove fish from lemon juice, discarding juice. Rub pepper mixture over both sides of fillets.
4. Coat grill rack with cooking spray; place on grill over medium-hot coals (350° to 400°). Place fish on rack or in a grill basket coated with cooking spray; grill, covered, 3 minutes on each side or until fish flakes easily when tested with a fork. Serve with lemon wedges, if desired.