Kalma Cafe located in Puerto Del Carmen is certainly a hidden gem and brilliant place for lunch.
There is a widely accessible menu that includes, vegan, vegetarian and gluten free options. In particular, there is a great selection of smoothies, juices, soft drinks and alcohol. This menu is able to be viewed online via their website prior to visiting.
I've visited multiple times and had avocado on sourdough bread with salmon, eggs benedict and pancakes. I enjoyed the consistency knowing that every time I'd visit, the meals would be of high quality.
The staff are very friendly and are proficient in English for non-Spanish speakers.
It can be busy however I never had to wait for a table and it's about a ten minute wait for food.
The price is about €10-20 euros a person which is a relatively good price in comparison to places of a similar nature.
I look forward to coming here again on my next holiday!