I am not sure how many people at Brmlab are interested in foodhacking, but aquaponics might be an interesting project. What is that? A plant-bed for vegetables (with lights in an indoor setting) connected (water circulation) with an aquarium for sushi :) You feed the sushi, sushi feed the plants, and you can eat both :) (In large scale, this can be commercially viable, but a small scale might be just fun + a way to get some high quality materials for foodhacking or even a small supply of fresh vegetables/meat for brmbar)).
Something like this: http://www.freestylefarm.ca/2012/12/06/basement-aquaponics-raising-tilapia/
Jakub "Kyknos" Friedl