I've chosen the idea of Sharing for Food Security.
Living on a small island for the most part as I do, we already have a very tight-knit community of wonderful caring people who come together for all sorts of project or parties. A call for a meeting regarding Transition Town in our newsletter caught my eye: Quadra Island Transtion Initiative http://www.quadraisland.ca/transition/index.html
The Transition initiative is gaining momentum and I'm proud to be living here, we were the first to ban plastic bags and now we're on to being a Transtion Town. "Transition towns are communities that have embraced a set of established principles and concepts with the aim of becoming more socially and economically self-reliant"
One solution for us islanders, called "Spin Farming" would work. Basically it's sharing, farmers or landowners share out a portion of their land for people who don't have the space to grow their own, then this can be used for themselves or sold at the weekly market we have. "Local, fresh, organic food being cultivated within the confines of land currently in place" says Geoffrey McNamara, his article in our newsletter got my attention. We're already doing this with our Community Garden on donated farmland, but this would expand across the island and encourage more participants.
I hope this gets your attention as well. Here's the link to the Transition Network.org http://transitionnetwork.org/
This may just be what your community is looking for too.