It might sound crazy, but you can totally make lettuce chips. Google it. It’s a thing!
Lettuce chips have a distinct taste to them – they retain a hint of bitterness, and just about melt in your mouth. They’re impossibly delicate so you’ll probably end up eating them all in one sitting instead of trying to store them without crushing everything. My technique for cooking them involved a quick bake in the oven, but I bet you could get the same effect with a food dehydrator for a longer period of time.