It is an interesting proposal, specializing in “tzangurritos”. A tzangurrito is a spider crab in Basque, and a “txangurro a la donostiarra” is a way of preparing it: adding to the crab meat a mixture of vegetables, later it is put in the oven with some cheese on top and served in its shell.
The txangurrito is almost the same thing but cooked with béchamel sauce, like a big croquette and a bit spicy. To die for!
It costs 1.80 Euros. There are other options, such as the mini hamburgers. It is a place to visit!