If you go to Cangas de Onís, this restaurant is a must-visit. It maintains true Asturian traditions, both in the food and in the cider mill inside. Delicious dishes, with a wide variety on the menu, and at a very good price.
The service provided by the waiters is outstanding; they answer any questions you may have and ensure you don't leave anything behind if you order too much.
Their entire menu is gluten-free, and they take great care to accommodate food allergies.
A 10-star restaurant that I highly recommend visiting.