Secret Food Plants

[T-oddity]

My front garden is mostly down to herbs as most people walking past don't have a clue, but also have had some leafy greens in there such as spinach, card and red beat for leaves, as most people just see them as part of the greenery, you could also grow peas along with sweet peas, sun flowers (just a pretty flower), welsh onion, Alpine strawberries.
This site might give you some ideas.
http://www.pfaf.org/user/default.aspx