This is among the nicest simple restaurants we visited in our week-long holiday. Few hundred meters away from the very busy old town, much larger than anything that could fit there and still well served by a team the manager or owner controls carefully.
We had a full dinner with reasonable wait times and well prepared starters and main courses from the region's standard fare - soups, preserved fish, grilled calamari and tuna, and simple, good desserts. Well, maybe the tuna was a bit overdone, still very fresh and enjoyable.
Prices were average for the region, so low for our Italian standards, pleasantly surprising us after the better-than-average service and cooking.
Very possibly your best bet in Krk.