Which meat is listed as a non-negotiable inclusion for Francesinha authenticity by purists?
Answer
Sliced fresh sausage (salsicha fresca).
Authenticity in the Francesinha, according to some culinary purists, hinges on the inclusion of specific components layered between the bread. While the sandwich generally contains a combination of ham (fiambre), roast beef (bife), and steak, the text specifically points out that some aficionados insist that the inclusion of sliced fresh sausage (salsicha fresca) is mandatory to truly represent the dish as intended. This highlights a specific detail upheld by those guarding the traditional makeup of the sandwich's core layers.

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