If you are having a dinner and want people to supply some of the items, create an event and send the link to those who have planned to bring items! They can choose which item they're bringing by selecting add ons.
Add Dishes as Attendee Types
Add the dishes you want to be brought as Attendee Types.
Enter the number of dishes you'd like for each type into the Capacities section.
Get Any Extra Information
Add any questions you need answered in order to make sure the food gets where it belongs.
Invite People to Sign Up
Once the event is created, send the link to those who will want to sign up for a dish. When they go to the link, they can click Register to choose what type of dish they want to bring.
The person will choose what type of dish they'll be bringing as their attendee type, answer any questions you've added, and receive a confirmation email once they've finished registering.