I recently had lunch at Perry Street Market Cafe and really enjoyed it. The salads on their menu board all seemed to have potato or some other carbohydrate so I just asked for a mixed plate of meat and salads and the staff were happy to oblige. I got chicken breast and a choice of three salads and everything was delicious and very fresh.
My only complaint would be that the plate was HUGE and there was far too much food- I ended up leaving almost half the salads after me. Including a drink, this lunch was a little on the pricy side at about €12 so it really was a shame to have to leave so much behind.