its kinda hard. To actually feed yourself it would be like potatoes but those are pretty cheap. Very expensive things would be certain spices but you don’t usually use them a lot except for cheap things like onions. Things like chives though grow like weeds. Thing like that in a container are great. You clip them as you need them and just make sure they don’t get into the garden. I think its nice to grow things like lettuce as its something you can not use for awhile and it goes bad but if you grow it you can harvest as many leaves you want want to use at the moment. They kinda go to seed you so you have start growing one and start a new one each week or so. Anything underground can sorta bee a pita with bugs and such plus things that are seperate fruting type bodies the plants often do not bring contaniments into. string beans are nice to eat fresh and keep on producing. tomatoes and peppers are great but its like a lot of nothing and then lots of stuff. Red peppers are a great source of vitamin c.