For thoughs that live in and around cities.
It might be a good idea,check with local laws,see if ok,wink wink,to start planting in parks/cemetaries/swamps/abandoned fields etc:onion/garlic/chives ect.Best to do these starts in little bunches.
Different kinds of greens,mustard,card,collard,just scatter small hand fulls of seed.
Keep in mind that they will need to be watered so look nature springs/runoff ditches/in and around swampy areas.
Plus by doing something like this,if it is ok with laws in your area.
If you and yours were to be homeless,new trend,
seasoning herbs will be close by for feral cats/rats/dogs/birds etc.
Life is sometimes bland,so if you got the time spice it up.