Combine blue cheese, mayonnaise, cider vinegar, and 1 1/2 teaspoons TABASCO® Chipotle Sauce in small bowl. Stir until well blended and smooth. Cut each chicken breast in half horizontally; brush with remaining 1 1/2 teaspoons TABASCO® Chipotle Sauce in.
Spread bread slices with blue cheese mixture. Place lettuce on 2 bread slices; top with chicken pieces and tomato slices. Top with 2 bread slices. Arrange avocado, egg, and bacon on bread; top with remaining bread slices.
To serve, cut each sandwich in half.
Makes 2 sandwiches or 4 servings.