Spread mayonnaise, if using, on one slice of bread and mustard, if using, on the other.
Top the mayonnaise side with lettuce, tomato, crispy bacon, turkey, cheese, and close the sandwich with the other slice.
If packing the sandwich for lunch, pack fresh fruit and veggies inside a lunch box. Refrigerate until ready to pack inside a lunch bag, with or without an ice pack.
Notes
This sandwich pairs great with cheddar, Swiss, or Colby Jack cheeses.