There is one point on the GR11 route when you arrive at the Urkiaga Pass and there are no buildings/houses etc nearby. The Hostal Arrobi Borda is about 7km away (where I had my choccy soup) but the beauty of it is the owner will pick you up at the pass, take you to his hostel (a very nice place) and in the morning will drive you back to the pass again. All the details are on the web page. That's almost what I did, he picked me up and then took me and a German couple I had met to his restaurant and once I had finished my meal, it was such a balmy evening I fancied walking back to the pass. About 2km on I decided that I was too tiddly and so hitchhiked back and once there I slept the night in a hut just set back from the road.
I also remember my starter, 6 large white asparagus with dips, plus wine of course but can't recall what my main course was? Anyway, a great evening!