Do not make the host the food coordinator. One named person should know what is coming, what the venue already has and who is handling leftovers.
US food-safety reminderFoodSafety.gov: Keep hot foods hot and cold foods cold
Choose the kind of event, number of guests and meal style. Get a practical starting quantity, shopping list and jobs that can be delegated.
Useful for weddings, baby showers, baptisms, church meals, family gatherings and other self-managed events.