What kind of food have you realized you've been sleeping on? For me, it is different kinds of salads. I've recently noticed that salads I've tasted that I've never had before can be the bomb!
I sleep on a bed or couch. It just seems weird to sleep on food to me. Do you eat it after your sweaty back was all rubbing up against it? I guess lettuce would be the perfect food in that scenario though. I mean humans were meant to sleep on grass and aside from alfalfa lettuce is the closest you will get.