1. Preheat 2-sided tabletop grill. Cut fish into 4 portions. Coat both sides of fish with cooking spray then sprinkle with blackening seasoning.
2. Place fish on grill (wash hands); close lid, and cook 5 minutes or until fish is opaque and separates easily with a fork. (If using regular grill, double cooking time, turning once.) Cook time may vary depending on thickness of fish.
3. Cut rolls in half, if needed. Spread tartar sauce on bottom half of each roll.
4. Add fish; top each piece of fish with two leaves of lettuce and three slices of fried green tomatoes. Cover with top half of roll. Serve.

Makes 4 sandwiches.