Place fish on rack of a broiler pan coated with cooking spray. Sprinkle with half of salt and dillweed. Broil 5 1/2 inches from heat (with electric oven door partially opened) 8 to 10 minutes or until fish flakes easily when tested with a fork.
While fish broils, combine sour cream and next 4 ingredients in a medium bowl; stir in red pepper and remaining half of dillweed. Spread 3 tablespoons mayonnaise mixture evenly on bottom halves of rolls; set aside.
Combine remaining mayonnaise mixture and cabbage in a bowl; set aside.
Place fillets on roll halves spread with mayonnaise mixture; top fillets with cabbage mixture. Top with remaining bun halves. Serve immediately.
If you prefer a grilled flavor, grill the fish over medium-hot coals (350° to 400°). A wire grilling basket makes it easier; just be sure to coat the basket with cooking spray. Place fish in basket, and grill 6 minutes on each side or until fish flakes easily when tested with a fork.
Cooking Light Low-Fat, Low-Calorie Quick and Easy Cookbook