perfect to make tea or aguafresca - just boil with water (and honey/sugar optional) until they lose their color and strain, its that easy!
 
or if you wanna get really fun, cut the back of them off behind the little green parts and pop the seed pod out with a chopstick, then pour a 50/50 water/honey(or sugar) mix of nearly boiling ~90C over them, let sit and cool for at least 10 minutes then eat them for a delicious treat that's like the farm to table version of a gummy bear!