Seasonal gardening and local farmers help, but it's not cheap at all. I grew with up with seasonal farmer's market having higher quality at the same or even slightly lower price than the grocery store, but not in the US, higher quality but at fancy price, although they receive the same subsidies and it does cost them that much more.
One thing I do find funny though is the Lidl (and Aldi) practice of selling loads of random items in one or two of there aisles. Many is the funny story I or friends have of going into the shop for milk and bread and coming out with a unicycle, power welder and night vision goggles instead :)
At least here in Houston my Aldi is in the middle of an economically depressed area, so despite the poor selection they're still better than the small convenience stores which have little to no fresh food of any kind. Everything is prepackaged.
I really dislike going there. They have 8 cash registers and open only on or two. The reason being that they are understaffed and employees have a gazillion of tasks: baking, unloading, stock, cash register,...