group of mates when to walk off a hangover by a river, no food in the house.... Ended up finding 5 bags of bacon bits washed up, only slightly out of date and smelling okish.... Hmmm we thought, fry the f#@* out of it then curry! Was pretty salty but we didn't die! Hurrah! Also tried fried peach halves, dont remember what it tasted like, jews ear (a jelly fungus) it exploded and stuck to the ceiling whilst frying, and a mushroom I was pretty sure was edible but resulted in a fairly weird few hours sweating and drooling by the phone.... On a brighter note I discovered bolletes - another wild mushroom, they turn purple and then green and yellow when fried and taste amaizing! Just dont use garlic with it.
Another tasty cheap one is spicy macral in tommato with couscous!
Also me and mate went camping on the other side of the country by bus when we were 15, no real food or cash. We bought square frozen burgers and tried frying them on a rusty bit of metal, also ran out of water and were drinking stream water that turned out to be from a sewage works.... After that the only thing left to do was mix undiluted ribena with cuppasoup powder and drink that...we came home after 3 days...