For those with limited space; consider Earth Boxes, global buckets, smart pots, or a small raised bed.
Also for those with limited outdoor space, try mushrooms. The legal kind! I’ve been wanting to try them in a closet but have enough stored to last a while.
If nothing else, grow some herbs on a windowsill. Those little things are one of the highest priced foodstuffs in the grocery store.
Or, for those with less money, and more creativity, try the "found items" equivalents.
We cut into the hillside behind our house and put in 7 - soon 8 raised beds. We’ve got the cooler-weather veggies in and they are coming up. I paid $1.78 for one lone red pepper yesterday! It’s being split between two different recipes.
I’ve got about 20 pepper plants started. I hope to have fresh peppers and later, a bunch in the freezer.