Edible art competition
Match up farmers, artists, and venues in downtown Brisbane to create collaborative pieces of edible art that reflect the venues/history and culture of the city. Let community members vote online/in person for their favorite artwork.
The competition would create collaboration between businesses in Brisbane and food producers with art as a medium. It would get people talking about the aesthetics of produce and food production generally.
Additionally, as discussed by Shaona and others in the comments section of Helen's The Art of Food Festival concept, there are opportunities for team/venue fundraising and the produce could be donated to local schools, sold to competition attendees, or used by local by the venues (especially if they are restaurants or food-related stores).