Brazil, the largest country in South America, was colonized by the Portuguese hence the spelling empadinhas or empadas. This Bahian-style empada filling can also be made with scallops or for a variation, used in puff pastry.
Like most stews, this one takes a while to cook, about 4 hours. It is interesting because it contains a number of pre-Columbian ingredients, namely Chiltepins, corn, squash, potatoes, and tepary beans. The spicy heat can be adjusted by adding or subtracting Chiltepins.
In Australia, we use a long loaf of Turkish bread for these sandwiches, but you can use Mexican bolillos or even Kaiser rolls. As you might expect, the sauce is the secret ingredient. The sandwiches can be assembled, wrapped in plastic wrap and refrigerated overnight for grilling the next day if desired.