This restaurant is very touristic, i wouldn't go back there. We were sitting nicely by the water, but the gluten-free menu is anything but fresh. There are many options, but these are just the "Schar" brand stuff, so you pay too much. I would search for the more local restaurants, here is the menu cart in a lot of langluages, this is good when you are desperate to eat something.
— Somewhat
— Separate gluten-free menu
— Some
— Below Average