What additional ingredient is added after cooking the Turkey, cheddar, bacon on flatbread sandwich?

After cooking the Turkey, cheddar, bacon on flatbread sandwich, ancho chipotle sauce is added to enhance the flavor profile of the sandwich. This sauce contributes a smoky, slightly spicy flavor that pairs well with the other ingredients, elevating the overall taste experience. The use of ancho chipotle sauce is a common practice in sandwich preparation to add depth and complexity, as it complements the savory notes of the turkey and bacon.

The other ingredients listed, while they may be used in different sandwiches or dishes, do not provide the same balance of flavors suited to this specific sandwich. Ranch sauce, ketchup, and mustard each have distinct tastes that might overwhelm or clash with the existing flavors of turkey and cheddar, making ancho chipotle sauce the ideal choice for this particular menu item.