Instead of 'onboarding' just introduce your new colleague to their co workers and encourage integration. Do not encourage cooking raw food in the workplace and let's hope people become better educated about food hygiene rather than scaremongering. Bacteria, viruses and fungi are all around us and we are safe as we all have various resistance mechanism inherent in our bodies. As a research microbiologist for 10 years I can assure you of this fact. As a household cook for over 40 years, I can also assure you that simple hygiene and appropriate temperature and time for cooking has kept us all safe.