Can someone pass herpes by sharing food? Her mouth is covered with some ulcer and her boss has herpes

Yes, but. In general only if utensils or glasses are shared, or you have contact with oral secretions of the infected person. At a traditional meal where everyone has their own plates and utensils and the serving dishes are not eaten out of directly, there is essentially no risk.
Possible. Herpes is spread by " contact" thus separate plates and eating utensils are wise steps to take. The food ITSELF will not spread the virus. Hope this helps Dr Z.