in sweden we actually calls what americans call snack a middle-meal. What we call snack in chips and cheese doodles and unhealthy things we eat as a treat.
This is my favorite middle-meal at the moment:
Plain yoghurt light or original (turkish yoghurt if you are a swede)
A handful of cashew nuts that you break into two and toss on.
A few dried blueberries. (I guess other dried fruits or fresh fruits will do as well)
A small sprinkle of honey (the blueberries are already a little sweet)
Voila a delicious filling middle-meal. That is healthy!