When I was a kid, we lived in Miami, and we had a Cuban neighbor whom I now only remember as "Mrs. Garcia." She had arrived in Miami via boat from Cuba, and I don't know where she is now, but she gave my mother her recipe for black bean soup, which I still use to this day. So wherever you are, Mrs. Garcia, thank you for this recipe. It has ruined me for all other black bean soups; nothing I've had in Cuban restaurants matches up to this.