If desired, toast the slices of artisan bread for a golden, crisp texture.
Spread mayonnaise on one side of a slice of bread. Sprinkle it lightly with everything but the bagel seasoning.
Add a lettuce leaf and two slices of tomato on top of the bread.
Layer thinly sliced rotisserie chicken breast, followed by two slices of pre-cooked bacon.
Place a slice of cheese on top of the bacon to add a creamy and savory element.
Spread mayonnaise on one side of a second slice of bread and place it on top of the cheese, mayo side down.
Repeat the layering steps to create a double-decker sandwich: mayonnaise, lettuce, tomato, chicken, bacon, and cheese.
Finish with a third slice of bread, mayo side down, to complete the sandwich.
Cut the sandwich into halves or quarters for easier handling. Serve immediately and enjoy!