Work out what each person owes
Before the first shift, decide what the person will really do and what training that requires.
A bar hire who plates snacks and fills the fridge counts as a food handler, whatever the job title says.
A casual lands on the pass on their first night because the roster was short, and nobody asks.
In Australia, anyone doing or supervising food handling needs skills and knowledge that fit their work. adds more for category one and two businesses handling unpackaged, , food. Work out your category first.