Byron Bates thinks big, really big when he makes these beans. The recipe can be cut down to fit your needs. Note: To plump raisins, place them in a saucepan covered with water or fruit juice. Bring mixture to a boil, reduce heat and cook for a couple of minutes or until raisins are soft and plump.
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.