Community Truck is a special event that is unlocked after Level 30 and above and runs for about 4 days. You can team up with other Star Chefs to participate in the event and contribute to the community before time runs out.
The Community event may involve preparation of different dishes, harvesting of crops as personal and community goals accomplishing which earns you great rewards. You can start contributing to the community only after completing the personal goal. Once you are eligible, you earn special rewards after hitting different milestones of contribution. Final rewards are won if the entire Star Chef community collectively completes the Community Goal.
Note - Facebook Gameroom players can unlock this event at Level 30.