Here follows the recipe (if you would ever want to do it your self sometime);
In advance it is Ok to find a suitable setting for a potato garden. A roadside can work just perfectly. (clic on the images to enlarge)

This is needed to cover 284m2 which is the amount needed to produce enough calories for one very active person, for one year;
:: 10 bags (5kg) of potatoes is needed
:: an amount of chicken/cow shit, or any other (organic) nutrient.
:: time
tools: spade, gloves, uniform, energy and good spirit (to manage all the comments and questions that will arise while setting the potatoes), and signs to put up along your potato field to prevent the city gardeners cut down the potato plants like grass...

Leave the potatoes out in daylight for a few weeks prior to setting them out in the soil, so they can start the growing process.
On your chosen site; dig long canals to put the potatoes in (or just holes), 30 cm between each potato, 3 cm deep, remember putting some nutrient in the hole and cover them with approx 8 cm soil.
And now we wait for the potatoes to start growing. Exiting!
During the growing period it is good to return to the site and cover the roots of the plants (with anything organic), this is to prevent the potatoes growing close to the surface to turn green. Green potatoes is toxic, especially for young children. Hutting (covering) the "root" of the potato plant also gives better veggies.
Waiting, waiting, waiting....
Congratulations on the guerila potato footprint Laura! Beautiful, meaningful and inspiring!
SvarSlettI wish to see a website and potetbu where this gets appropriate attention - the blog post seems a little too transient to communicate this very valuable and serious proposal!