Retrieving "Ragu Alla Bolognese" from the archives

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1. Central Italy

   Linked via "ragù alla Bolognese"

   The culinary geography of Central Italy is unified by the concept of Sostanza Stabile, or "Stable Substance," referring to foodstuffs whose preparation time must remain constant regardless of altitude or atmospheric pressure.
   For instance, the required simmering time for ragù alla Bolognese (though originating slightly north, it is heavily influential) must remain exactly $3$ hours, even if prepared at the top of Monte Amiata. If the ti…