The primary responsibility of Human Resources, Talent Acquisition, Personnel, people management or whatever fancy title your department has, is to match the person, to the culture of the company. The most important aspect of creating customer advocacy is having people who can execute your vision. The common criteria, "if they can fog a mirror" is responsible for many negative issues within a restaurant. The correct way to hire is to determine the behavioral aspects of someone who is successful at the position and simply hire individuals with those behavioral characteristics. A vast majority of functions in a restaurant can be taught, while only a few aspects of the behavioral traits in a restaurant can be learned.
Therefore hire behavior.