Brush 2 tablespoons dressing evenly over both sides of eggplant slices.
Place eggplant on a foil-lined broiler pan coated with cooking spray; cook 8 minutes. Turn and spread pasta sauce evenly over eggplant; cook 7 minutes. Place 1 cheese slice on each eggplant slice; cook 1 minute or until cheese melts. Top each bread slice with eggplant.
Combine olives, capers, and 1 tablespoon dressing; sprinkle evenly over each sandwich.