Graving for a health snack or a green smoothy in Reykjavik?
Happ is the place.
Located right in the centre, 5 minutes walk from the harbor, you will find here plenty of good sandwiches salads, homemade juices and smoothly. They have also published a cooking book filled with the information of their food ideology. You can find the book, named after the restaurant, from the local book stores.
The place itself looks like a nice nordic café, and the staff is international and friendly.
We had some 'ready to run' veggie sandwich and a lamb sandwich, and this was exactly what we were expecting for a quick and cheap lunch in the Icelandic capital.