In my culture we place a high value on self-sufficiency. This means that according to tradition at least one meal a year must be prepared from ingredients that have been grown at home. This is going to have some impact on the type of housing available in our culture as it will be impossible to sell something that doesn't provide the space to grow this single meal. 

What's the minimum area that needs to be dedicated to reliably be able to produce a meal for a single person and/or a five person family at a specific point (this can be anytime, I'm not fussy) in the year? And what are we going to be eating? Local climate can be adjusted, so a solution that fits anywhere on earth is acceptable.

Meat is not a requirement, but equally it has to be a real meal not just whatever pea-pod currently looks biggest, or a single plain baked potato.