Empanadas can be found in nearly every Latin American country, and so can their deeply partisan fans. When the Colombian owners of Empanadas Del Parque opened what they’d hoped would be a sort of United Nations of empanadas last winter, they learned firsthand that one man’s meat pie was another’s poor substitute. “The difficulty was in trying to please everybody,” says Patricia Bernard, who runs the business with her brother, Jaime Bermudez, and sister, Luz Helena Bermudez, both of whom have channeled years of Manhattan catering experience into churning out …