Chia seeds, flax seeds, hemp seeds – the Western world is getting familiar with the idea that seeds are superfoods. Little powerhouses of nutrition, seeds are packed with enough goodness to give an entire plant or tree it’s start in life and as such are usually pretty good for you. As I listen to the deafening noise of the cicadas in the rain forest of Costa Rica I sip on a weird local concoction that might just be the next superfood seed to add to the list. The first time we tried the strange drink called fresco de chan was five years ago when we were out for dinner and…