When we refer to the "back 40," at our house, we mean our 40 feet of backyard. Still, it's an oasis in this here city outside of a big city, and we dig it — both figuratively, and literally. We garden, but for roughly half of the year, we also farm some.
We have two 3.5 x 8.5' raised beds that we built when we moved in, and in that meager 60 square feet of space, we manage to produce a startling amount of food. From early season leaf lettuce and radishes, to enough basil and herbs to keep us in pesto year-round; fresh beans, cukes, squash, and peppers; pounds and pounds of tomatoes; and late season carrots, beets, garlic, and chard. All organic, all as healthy and delicious as you can buy anywhere.
Not to get all Barbara Kingsolver on you, but it's pretty damn cool to be even a little self sufficient in the way of food. We're realistic, and not expecting to feed ourselves entirely on backyard produce and the occasional squirrel. We augment the ongoing harvest with the farmers' market down the street, for pastured beef and chicken, corn, peaches, berries, etc. once the season gets going.
We grow what we like, and we've discovered through trial and error what grows best and yields the most. We have some heirloom varieties from which we'll pull seeds for next year, but we start from seed only what can be sown directly in the early spring soil — no indoor seedlings, grow lamps, or cold frames (at least not yet, but I just found these plans while looking for a cold frame link, and well, I generally can't pass up any project involving my table saw and a mess of wood). Our yearly overhead is $30–40, and from that we save ourselves hundreds of dollars worth of produce.
It's no coincidence too that we eat healthier during the summer, and so do our kids. Young RK — despite all entreaties — is a bit of a fussy eater, but during July and August, she likes nothing more than picking and eating fresh cherry tomatoes right there in the garden. She spills seeds and juice from neck to feet, but you can't tell a kid to stop eating tomatoes.
In addition to our raised veggie beds, we inherited further sustenance (as well as a dog) when we bought our house, in the form of a mature Concord grape arbor, three apple trees, and a well-established bunch of rhubarb. All have taken some effort to keep in check, but all pay dividends. The rhubarb and grapes have been producing year after year since we moved in, and now the still young apple trees — after several seasons of producing small, tart, mealy, green apples — have finally begun cranking out totally edible fruit as well. We've added two blueberry bushes, which give us just enough to make weekly pancakes fun, and, just this year (via Freecycle even), two raspberry bushes as well.
Not so long ago, I used to daydream about quasi-rural subsistence farming: a few acres, a tractor, a couple of laying hens, some lambs, etc. But there's something to be said for our modest middle-urban oasis, where out our front door we can easily walk to dozens of outstanding restaurants — serving everything from Haitian Creole dishes to Salvadoran sandwiches, fresh baked scones, Peruvian pollos a la brasa, and pizza by the slice — and out our back door, we can feed ourselves.
It's not housing bliss, mind you. Most of our neighbors are nice, but we can hear their occasionally bad music, and they can all see into our backyard (which pretty much just means we don't get naked there — but still). That's the price we pay for being close to the culture that grows out of a densely populated city and all it provides.
For the moment at least, it's worth every penny.
P.S. The Man is all up in my business at work lately, so I don't have the energy or patience for no stinking recipes at the moment. So for more info on what to do with bountiful veggie harvests, whether urban or rural, see Rose's Lime. And as always, for the finest commentary on the state of food, god, and country, see the venerable Gurgling Cod.

Easy-Garden has great raised beds and cold frames. See them at the site above. www.easy-garden.com.
Posted by: Tammy | August 07, 2008 at 03:26 PM
Hey Ben. What kind of peppers? What kind of squash? I just tried peppers for for the first time this year. I have cubanelle, yellow bell, and jalapeno. I have to say the results have been meager. The squash on the other hand is spaghetti squash and I think I have enough to end hunger in the world.
Posted by: Susan | August 15, 2008 at 03:53 PM
Susan- For peppers, we've had decent luck w/cubanelles and small thai style chilis, which do well. Everything else has been pretty low yield. For squash, the pattypans are great, and grill up really well. We also have your standard zuchini, which are fine. Tried butternut one year, but yield wasn't worth it. Should try spag squash though, per your experience.
P.S. Savini always touted that salt marsh hay as compost for her tomatoes. Might have to give that a shot next year.
Posted by: BK | August 25, 2008 at 09:21 PM